Journal of Manufacturing Processes

Article	Citations
Editorial Board	445
Editorial Board	312
Crack suppression in wire-arc directed energy deposition of a γ-TiAl alloy	285
On-machine high accuracy radial wear characterization of rotating milling tools using a camera-based system	261
The effects of Cr and Ni equivalents on the microstructure and corrosion resistance of austenitic stainless steels fabricated by laser powder bed fusion	257
Study on sustainable milling performance of aluminum alloys with application of blended plant oil-based composite electrostatic spray lubrication	222
Modelling the keyhole profile in laser welding through energy balance including the local contribution of multiple reflections through the plasma by ray tracing	198
The flat bottom drill for bone drilling without plunging	189
The influence of post-thermal treatments on microstructure and mechanical properties in A20X alloy fabricated through powder bed fusion	158
Experimental investigation of temperature field and formability of compact fused granulation fabrication barrel	155
Multilevel variable control for impulse-discharge thermochemical truing of diamond cutting edges in precision grinding	150
An investigation of monitoring the damage mechanism in ultra-precision grinding of monocrystalline silicon based on AE signals processing	147
A unified framework based on semantic segmentation for extraction of weld seam profiles with typical joints	144
Design intent-preserving non-rigid toolpath morphing: A novel skeleton-skin method for undercut compensation and rapid numerical control programming of near-net-shape parts	129
Robust thermal error estimation for machine tools based on in-process multi-point temperature measurement of a single axis actuated by a ball screw feed drive system	127
Asymmetry in microstructure and mechanical properties of FSWed joints using a hemispherical tool tilted towards the retreating side	126
An unsupervised welding quality detection method based on high-quality condition-guided diffusion reconstruction	121
Feasibility study on sensing and prediction of backside weld geometry in cold metal transfer welding of X65 pipeline in the vertical-up position	114
Hybrid manufacturing of ceramic-metal composites by vat polymerization 3D printing and pulse electroplating	108
Waterjet-guided laser drilling 2.5D Cf/SiC ceramic matrix composite material processing quality and removal mechanism analysis	108
Cracking mitigation of additively manufactured Inconel 738LC through addition of micro-TiC particles	106
Squeeze infiltration processing of lightweight smart aluminum graphite functionally graded composite for enhanced wear resistance	105
Rheological formulation of room temperature vulcanizing silicone elastomer ink for extrusion-based 3D printing at room temperature	104
Compressive residual stresses in LTT elongated bead welded in all positions for fatigue crack prevention of boxing fillet joints	101
On mechanism of tool-workpiece separation in multi-dimensional vibration-assisted milling	101

Reprint of: Physical modeling for digital twin of Continuous Damping Control damper	101
Development of Extractor-Classifier-Regulator integrated anomaly detection model for turning process	101
A receptance coupling procedure considering frequency-dependent behavior of holder-tool contact dynamics	100
Modeling of machining of EB-PVD ceramic coatings using smoothed particle hydrodynamics method	100
Investigation of generative design for powder bed fusion technology in case of Formula Student race car components using Ti6Al4V alloy	98
A comprehensive framework for stiffness modeling of industrial robot for machining applications	96
Interfacial structure, mechanical properties, and corrosion resistance of Cr/TiSiN nano-multilayer coating by filtered cathode vacuum arc technique	95
Longitudinal graded porous titanium fabricated by spark plasma sintering: Design of layers, direction of crack path	95
Vibration-based gear continuous generating grinding fault classification and interpretation with deep convolutional neural network	94
Material deformation mechanism of polycrystalline tin in nanometric cutting	92
Experimental investigations on thermo-stamping of carbon fiber reinforced polyamide 6 hat-shaped components with self-resistance electrical heating: Influence on microscopic and macroscopic properties	91
Effect of scanning spacing on the efficiency of CFRP hole-cutting with multi-pass scanning strategy by nanosecond laser	90
Microwave joining of SS-316 plates: A multi-physics simulation study	86
A new cross-domain bearing fault diagnosis method with few samples under different working conditions	85
Fatigue strength improvement of linear friction welded butt joints of low carbon steel by pressurizing after oscillation	84
An analytical force model in sawing brittle and heterogeneous material considering the interactions of grit-granite	83
Trajectory planning method with grinding compensation strategy for robotic propeller blade sharpening application	82
Delayed fracture stress thresholds degraded by the shear punching process in ultra-high-strength steel sheets: Analysis using an in-plane bending test with numerical assimilation	82
Effect of ultrasonic vibration on the machining performance and mechanism of hybrid ultrasonic vibration/plasma oxidation assisted grinding	82
Toward closed-loop quality assurance in powder bed fusion additive manufacturing: Defect detection, machine learning, and computational modeling	81
Effect of in-situ layer scanning ultrasonic vibration on mechanical and morphological properties of fused deposition modeled poly(lactic) acid specimens	79
Optimisation of a novel hot air contactless single incremental point forming of polymers	79
A critical review on advanced welding technologies to fabricate test blanket modules and irradiation damage behaviour of the welded joints in nuclear fusion applications	78
Defining the printing direction impact of additively manufactured sand molds on casting roughness	78
Field-assisted additive manufacturing of nickel-based superalloys: A review	77
Efficient end milling of curved thin-walled workpieces using a composite magnetic follow-up flexible fixture	73
Mechanistic analysis and optimization methods of post-cutting lateral camber formation in hot-rolled strips	73
Effect of nanosized carbon black content on the microstructure, thermal stability, and mechanical properties of 3D printed poly urethane acrylate	73
Strategy for minimizing deformation of DLP 3D printed parts using sub-build plate	73
Creating elemental gradient transition layer to improve the thermal fatigue resistance of femtosecond laser glass-metal welding	72
Atomization mechanism and machinability evaluation with electrically charged nanolubricant grinding of GH4169	72
Current trends and future prospects of electrodeposition technology for the preparation of heterogeneous structural materials	72
Evolution of propagation and failure by laser-induced shock waves within bonding interface of metal material	72
Stamping colors with solid-state superionic stamping (S4)	71
A novel heat source model for welding and additive manufacturing: The traveling steady pool approach	70
Study on the thinning characteristics of aviation tubes during bending forming under boundary lubrication friction	70
Ultra-strong bonding of 30-wt% GF/PET-A2024 aluminium alloy via collaborative promotion of ultrasonic-assisted FeCl3+N2H4 corrosion and the coordination bonds by Zr4+	70
Chatter detection and spindle speed selection by scanned periodic sampling frequency	70
Investigation of grain growth and impurity diffusion in highly conductive copper interconnect films obtained by pulsed laser scanning annealing	70
Additive manufacturing multi-material components of SAF 2507 duplex steel and 15-5 PH martensitic stainless steel	69
Modeling of micro-tooth topography in face gear grinding considering dynamic features of geometric-kinematic	68
Machining of Invar 36 alloy: Chip-flow behaviors and formation mechanisms	68
Directional enhancement of wettability for Al/stainless-steel system: Exploring the potential of laser-chemical hybrid surface texturing	67
Role of metal surface amorphization on enhancing interfacial bonding in TC4-UHMWPE hybrid structure	66
Investigate on material removal of 3C-SiC crystals in nano-polishing via molecular dynamics	65
Study on the evolution and suppression strategy of the interlayer gap in the drilling of CFRP/Al stacked materials	65
Surface prediction in laser-assisted grinding process considering temperature-dependent mechanical properties of zirconia ceramic	65
A new springback calculation method for double-curved medium thick plates based on the curvature of discrete points	65
Achieving high precision and strength synergy on diffusion bonding of 6061 aluminum alloys via pre-strain inducing interface migration	65
Real-time identification and measurement algorithm of typical welding defects based on line-structured light active vision	65

Performance analysis of conventional and high-feed turning tools in machining the thermally affected zone after plasma arc cutting of low carbon manganese-alloyed steel	65
Novel insights into particle dynamics and deposition mechanisms during soft blade powder spreading in laser powder bed fusion	65
Multi-material additive manufacturing of aluminum 6061-T6 alloy with stainless steel 304: Suppression of intermetallic compounds and interface growth mechanism	65
Multi-axis direct metal deposition process with effective regrouping strategy	65
An innovative process of clad teeming and rolling for preparing stainless steel/carbon steel clad plate	64
Study on the nano-cutting mechanism of monocrystalline silicon material with an amorphous layer by molecular dynamics simulations	64
Possibilities, performance and challenges of nitinol alloy fabricated by Directed Energy Deposition and Powder Bed Fusion for biomedical implants	64
Prediction of the energy consumption and surface integrity in machining of Inconel 718 superalloy using an orthogonal cutting model considering the stress state	64
Unraveling the potential of multi-sensor fusion of acoustic signals and melt pool geometric images towards defect identification in additive manufacturing	63
Influence of tool vibration and cutting speeds on removal mechanism of SiCp/Al composites during ultrasonic elliptical vibration-assisted turning	63
On the brink of mass production and simultaneous multi-component surface modifications for ultra-fast polishing: Plasma electrolytic polishing process	62
Characterization of friction coefficient at near solidus forming (NSF) conditions using T-shape compression test	61
Modeling of cold pilgering of stainless-steel tubes	61
Phenomenological modeling for femtosecond laser processing of fused silica	61
Development, challenges and future trends on the fabrication of micro-textured surfaces using milling technology	60
Achieving superior tribological resistance of Ti-6Al-4 V alloy via femtosecond laser shock peening	60
Improving bending and interlayer properties of hybrid-fiber-reinforced composites through functionally graded hybrid strategy by 3D-printing manufacturing process	60
Study on the microstructure and properties of rail cladding layer after laser quenching	59
Effects of laser scanning speed on the microstructure and mechanical properties of 2205 duplex stainless steel fabricated by selective laser melting	59
Study on the weld pool oscillation behavior during pulsed gas metal arc welding	59
The effect of build orientation on tensile properties and corrosion resistance of 316L stainless steel fabricated by laser powder bed fusion	59
Bi-metal structures fabricated by extrusion-based sintering-assisted additive manufacturing	58
Understanding the factors critical to the TIG welding of Cu components in bar wound electric motors	58
Surface morphology improvement and residual stress distribution of SiCp/Al composites using high-power fiber laser-CNC milling cooperative machining strategy	58
Vacuum melting of compressed powders and hot rolling of the as-cast Ti-48Al-2Nb-0.7Cr-0.3Si intermetallic alloy: Mechanical properties and microstructural analysis	58
An imbalanced small sample slab defect recognition method based on image generation	58
Revolutionizing manufacturing: A comprehensive overview of additive manufacturing processes, materials, developments, and challenges	57
Ultrasonic system and ultrasonic metal welding performance: A status review	57
Numerical simulation of weld formation in friction stir welding based on non-uniform tool-workpiece interaction: An effect of tool pin size	57
Dual flexible contact material removal model for robotic disk grinding	57
Micro-extrusion: A potential approach to micro-manufacture miniaturize magnesium metal matrix composite components	57
A modified infrared emissivity model accurately determining dynamic temperatures for belt grinding Inconel 718	56
Hybrid additive manufacturing of AISI 316L via asynchronous powder and hot-wire laser directed energy deposition	56
Grinding performance and parameter optimization of laser DED TiC reinforced Ni-based composite coatings	56
Modeling and prediction on grinding force in ultrasonic assisted elliptical vibration grinding (UAEVG) of SiC ceramics using single diamond grain	55
Investigation on mass transfer mechanism of inter-wire arc in skew-coupling arc welding	55
Transfer learning for autonomous chatter detection in machining	55
Modeling and analysis of the instantaneous undeformed chip thickness in multi-axis torus milling in the aspect of tool wear	55
Weld formation, arc behavior, and droplet transfer in narrow-gap laser-arc hybrid welding of titanium alloy	55
A novel electric field-assisted material extrusion process for clean additive manufacturing	54
Effect of alkoxide film on chip morphology under electrostatic catalysis in cutting 1060 aluminum alloy	54
A cost comparison of automated fibre placement and filament winding for composite pressure vessel manufacturing	54
A mixed fluid film lubrication model to predict the tool-life of IBAP tool considering abrasive and molten water interaction with workpiece	54
Machine vision–based automatic planning for microdroplet coating trajectory on irregularly shaped regions of metal surfaces	53
High-frequency electrical discharge assisted milling of Inconel 718 under copper-beryllium bundle electrodes	53
Digital twin with dynamic mechanistic simulation core for milling tool wear prediction	53
Optimization of cutting force fitting model by Fast Fourier Transformation in milling	53
Arc instability in hybrid laser-GMAW welding process using Ni based filler wire NiCrMo-4	53
Enhancement of optical surface quality based on real-time compensation of temperature-driven thermal errors in diamond turning	53
Retraction notice to “The role of defect structure and residual stress on fatigue failure mechanisms of Ti-6Al-4V manufactured via laser powder bed fusion: Effect of process parameters and geometrical	53
Self-piercing rivetability of steel/aluminum and its improvement using reinforcing plate	53
Impact of fast-frequency pulsed current wave on microstructure and mechanical performances of 1060 Al alloy welded by FFP-VPTIG	52
A knowledge-transfer based multiscale machine learning framework for predicting solidification process defects	52
Solid-state Additive Friction Stir Deposition (AFSD) of dissimilar Al Cu materials with FSP-enabled interface design for improved metallurgical bonding	52
Inkjet printing of a polymeric vibration damper for MEMS application adopting a step-reticulation process	52
Research on enhancing the cutting efficiency of ultrasonic osteotome based on periodic impact vibration ultrasonic power technology	52
Evolution mechanism of fracture interface wave and microstructure during resistance butt spot welding	51
Residual stress simulation for bimetallic sleeve roll constructed by shrink-fitting in comparison with bimetallic solid roll	51
Single start end tool path generation for arbitrary porous surfaces	51
Editorial Board	51
Study on microstructural evolution of near-net shape forging process of AA6082 wheel – Dynamic recrystallization and processing map analysis	51
Effect of minimum quality lubrication on micromilling of TiBw/TA15 composites considering tool wear	51
Laser transmission welding of Polyphenylsulfone resin using Sn film absorbent: Weld formation control and mechanical properties enhancement	51
Diffusion bonding mechanisms of pure Zr with a Ti interlayer: Microstructural characterization and polycrystalline molecular dynamics simulations	50
Influences of rotary axes on nonlinear error for five-axis machine tool with different configurations: Theoretical model, deduction and simulation	50
Investigation of tailored softening behavior of aluminized boron steel (22MnB5) in hot stamping process using die surface relief patterns	50
Effects of welding speed on welding process stability, microstructure and mechanical performance of SUS304 welded by local dry underwater pulsed MIG	50
Filtered kriging for improved interpolation of periodic manufacturing surfaces	50
Mechanism and technology of laser adaptive cleaning for aircraft skin multilayer coatings of airbus A320	50
Evaluation of radially polarized femtosecond laser drilling of film cooling holes	50
Research on the multilayer injection molding of thick-walled polymer optical products	50
Adaptive modeling of rolling force for hot rolled plate based on industrial data	49
Editorial Board	49
Black pigment tuning in DLP ceramic printing: A unified strategy for cure control, strength, surface quality, and dimensional precision	49
Theoretical and experimental investigation on material removal mechanism in dual-rotation polishing of fused silica glass	49
Study on temperature control and bonding properties of Ti/Al composite plates rolled by differential temperature rolling with mobile induction heating	49
A novel method to predict residual stress by coupling the phase transition effect for LA103Z Mg-Li alloy milling	49
Springback behavior after air bending of pre-strained AA 6016-T4 sheets: Influence of dislocation density and backstress on model accuracy	49
Surface characteristics and tribological performance of Ti6Al4V peened by sinking bead abrasive waterjet	49
Study of underwater plasma arc ignition and cutting process for surface nonconductive steel structures for offshore decommissioning	48

An improved residual height model for compliant robotic belt grinding with application to dwell time optimization	48
Effects of plasma electrolytic polishing on the surface and mechanical properties of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si specimen fabricated by laser powder bed fusion	48
Laser keyhole welding of dissimilar metals with spiral contours: Metal mixing, microstructure, and mechanical strength	48
Coupling vibration characteristics and vibration suppression of rolling mill rolls with dynamic vibration absorber	48
Surface integrity of Nomex honeycomb composites after ultrasonic vibration machining by using disc cutters	47
Additive manufacturing of non-planar layers using isothermal surface slicing	47
Method of ensemble modeling for abrasive water jet machinability of metal materials	47
Strength and microstructure of friction stir welded additively manufactured Scalmalloy® in as-welded and heat-treated conditions	47
Machine learning driven prediction of mechanical properties of rolled aluminum and development of an in-situ quality control method based on electrical resistivity measurement	47
Tailored microwave thermal crack heating model and its application in cutting ceramics	47
Prediction and evaluation of surface roughness with hybrid kernel extreme learning machine and monitored tool wear	47
Research on the removal mechanism and surface damage of laser assisted cutting of CFRP materials	47
Evaluation of graphene nanoplatelets addition and machining methods on the hole quality and bearing strength of glass and carbon fibre reinforced epoxy laminates	46
Advanced feeding strategy driven by staged growth velocity for groove-section profiled ring rolling	46
Resistance spot welding behaviour of novel medium manganese (M-Mn) steels - Role of welding parameters on weld microstructure and mechanical properties	46
Numerical study on local residual stresses induced by high frequency mechanical impact post-weld treatment using the optimized displacement-controlled simulation method	46
High bonding strength of Ti /steel clad plates prepared by a developed electromagnetic induction heating followed by rolling	46
Double-pulse laser micro sintering of iron powder in multiple overlapping tracks: Experimental study and material characterizations	46
Acoustic field-assisted inkjet-based additive manufacturing of carbon fiber-reinforced polydimethylsiloxane composites	46
Influence of alloy composition and lubrication on the formability of Al-Mg-Si alloy blanks	46
Geometrical and grain size effects on the forming quality and defects of ribbed cladding tubes	46
A data-driven predictive maintenance framework for injection molding process	46
Control of dimensional accuracy of hollow turbine blades during investment casting	45
Recent progress of sensing and machine learning technologies for process monitoring and defects detection in wire arc additive manufacturing	45
Machining characteristics and principle in graphene-oxide-enhanced photocatalysis-assisted polishing of SiC ceramic	45
Improving flatness of machined surface in rotating cathode electrochemical milling	45
High-quality machining of thin copper plate based on error proofing method	45
Polymeric advancements in innovating wax injection molds using aluminum-filled epoxy resin with face-cooled waterfall cooling channels	45
Review of in-situ process monitoring for ultra-short pulse laser micromanufacturing	45
Tool path modeling and fabrication of multi-boundary lens array by tool offset end-fly-cutting	45
A transient cutting temperature prediction model for high-speed ultrasonic vibration turning	44
Effect of the substrate inclination angle on 316L stainless steel fabricated by hollow-laser direct energy deposition	44
Investigation of collapse defect suppression in 20 mm-thick plate laser penetration welding via beam energy spatial control	44
Performance evaluation of DLC and NCD coatings in micro-milling of Al7075-T6 alloy	44
Development of microencapsulated phase change material slurry for diamond wire sawing silicon wafer and its effect on cutting quality	44
A predictive wear model in grinding using single-layer electroplated cBN tools	44
Study on hole wall morphology and defects in burst mode of femtosecond laser drilling	44
Theoretical and experimental investigation on material removal modeling in active fluid jet polishing of optical components	44
Closed-loop controlled conformal 3D printing on moving objects via tool-localized object position sensing	44
In-situ alleviation of surface modifier passivation effects in silver nanoparticle laser sintering process	44
Smoothing interpolation of five-axis tool path with less feedrate fluctuation and higher computation efficiency	44
Welding process with hybrid arc by compositing two free arcs into constraint arc	44
Microstructure and mechanical properties of Al-Zn-Mg-Cu alloy fabricated by multi-wire arc-based directed energy deposition	44
Anisotropic material removal in ultra-precision grinding of rounded diamond cutting tools	43
Experimental investigation on the development of hybrid composite metal foam reinforced with steel hollow spheres for higher energy absorption applications	43
Enhancing wire arc directed energy deposition for challenging printing tasks: A VR-based skill-learning approach	43
Advanced approach of forming cutting edge radii on cemented carbide cutting tools using plasma discharges in electrolyte	43
Heuristic algorithm for the topological optimization of runner system for the thermoplastics injection molding	43
Compensation method of wire electrode wear for reciprocating micro wire electrical discharge machining	43
Corrigendum to “Development of a critical edge-based adaptive toolpath strategy to improve geometrical accuracy of incrementally formed titanium implants” [J. Manuf. Process. volume 110, pages 114–125	43
Predicting solidification cracking in directed energy deposition of Hastelloy X alloys based on thermal-mechanical model	43
Sensitivity of thermoforming to friction and heat transfer: Simulation and experimental validation	43
On the mechanical behavior of the sintered Nd-Fe-B permanent magnet during diamond scratching	43
Numerical and experimental study of the size effect on deformation behavior and quality of microembossed multi-channel structures	43
CO2 laser cutting of reinforced polyester (CGFRP and GFRP) sheets: An experimental investigation into specific point energy, cutting volume efficiency and material removal rate (MRR)	43
An integrated learning, monitoring, and control system for ultrasonic metal welding	43
Proposal of tilted helical grinding for grooving ZrO2 ceramics – Investigation of groove profile formation and machining performance	43
Research on the characteristics of multiphysics coupling fields in the electrochemical trepanning of an inward facing blisk	43
Investigation of force modeling in ultrasonic vibration-assisted drilling SiCf/SiC ceramic matrix composites	42
Fabrication of smooth and deep microchannels on soft polymer by stretching enhanced cryogenic assisted micro milling	42
Custom post-processor based on the PSO algorithm for 5 axis machine tool compensation	42
Variable polarity plasma arc welding: Process development and its recent developments of detecting, modeling, and controlling	42
Drilling performance of micro-textured twist drill bit for TI-6AL-4V alloy: Validated FEM and statistical approaches	42
A milling tool wear predicting method with processing generalization capability	42
Weld joint penetration state sequential identification algorithm based on representation learning of weld images	42
The application of ultrasound in Joining: Principles, processes and properties	42
Laser powder bed fusion for the fabrication of triply periodic minimal surface lattice structures: Synergistic macroscopic and microscopic optimization	42
Research on precision machining for ultra-thin structures based on 3D in-situ ice clamping	41
Orthogonal dual-channel single-camera spectral imaging for online measurement of three-dimensional space–time evolution of temperature field in laser melt pool	41
Selective laser melting manufacturing and heat transfer performance study of porous wick in loop heat pipe	41
Methods and techniques for enhancing wear resistance of laser cladding coatings: A comprehensive review	41
Review on the effect of ceramic particles on the microstructure and mechanical properties of additively manufactured nickel-based superalloys	41
A novel bionic design method of groove-shaped pressure head for ceramic de-airing extruder: Improving surface quality and forming performance of extruded clay	41
Study of the system instability impacts on surface characteristics for vibration-assisted AFM-based nanomachining	41
Feasibility analysis and cutting process research on laser cutting medium-thick 20CrNiMo steel plates using a high-power fiber laser without assisted blowing	41
Turning of titanium alloy with PCD tool and high-pressure cooling	41
Improvement in weld quality of Al and Cu joints using dual-beam laser welding	41
Nano-borosilicate glass-silica ceramic material jetting technology for additive manufacturing of multilayer LTCC substrates	41
New cooling system with hollow mandrel in cold pilgering	41
Formation and mechanical performance of the pre-counter bore resistance rivet welded joints for thick cast aluminum and ultra-high strength steel	41
The study of an image feedback-assisted jet electrochemical additive manufacturing process	41
Preparation of TiNbTaZrMo high-entropy alloy with tunable Young's modulus by selective laser melting	41
A laser-shock-enabled hybrid additive manufacturing strategy with molten pool modulation of Fe-based alloy	41
Local shape adjustment and residual stresses of integrally stiffened panel induced by mechanical hammer peening	41
Support-free fabrication of complex 3D structures using supporting fluid-assisted embedded photocurable 3D printing	40
High-deposition laser brazing with enhanced surface quality, bridge performance and mechanical properties	40
Editorial Board	40
Comparative study on MQL milling and hole making processes for laser beam powder bed fusion (L-PBF) of Ti-6Al-4V titanium alloy	40
Scaling-up ultrasonic vibration assisted additive manufacturing to build 316 L 3 m3 waste container flange	40
Teleoperated welding by learning welder's torch maneuvering based on the wrist-inspired parallel mechanism	40
Features detection of Al alloy porosity during GTAW process based on arc spectrum and improved porosity-focus decision tree	40
Molecular dynamics simulation of dissimilar friction stir spot welding: Al Al and Al Mg joints	40
The influence of process parameters on flow-field characteristics and coating properties in nanocomposite spray deposition	40
Study on the influence of load inertia ratio on speed planning strategy of feed drive system	40
Numerical simulation and experimental study on electromagnetic punching-flanging process of 6061 aluminum alloy sheets	40