电弧增材制造316L不锈钢材料力学性能试验研究OA

Wire-and-arc additive manufacturing(WAAM)technology has the advantages of high deposition efficiency,low production costs,and minimal size constraints,offering broad application prospects in the construction industry.To investigate the mechanical properties of WAAM 316L stainless steel,uniaxial tensile tests were conducted on 36 specimens considering two nominal thicknesses,rough and smooth surfaces,and three sampling orientations.The technological parameters,material anisotropy,and the effects of rough surface on mechanical performance were analyzed.Based on the experimental results from this study and relevant references,mechanical parameters were calibrated through statistical analysis.The results show that WAAM 316L stainless steel exhibits anisotropy,primarily reflected by the considerably higher Young's modulus at 45° relative to the deposition direction compared to those at 0° and 90°.Rough surface reduces the material strength and ductility,with the most pronounced reduction observed in the direction perpendicular to the deposition direction.The design yield strength ranges from 230 MPa to 290 MPa,and the design tensile strength ranges from 435 MPa to 490 MPa.Recommended fifth-percentile values of Young's modulus in three directions are also provided.