Optimization of lateral friction stir additive manufacturing process and characterization analysis of mechanical properties
To study the effects of lateral friction stir additive manufacturing process parameters on the mechanical properties of materials in the additive area,the response surface model was established.The regression analysis of the model was carried out.The process param-eters were optimized based on the response surface method,and the reliability of the model was verified by variance analysis.The results show that when the additive parameters are rotation speed of 982.81 r·min-1,additive speed of 36.147 mm·min-1 and reduction a-mount of 2.428 mm,the maximum tensile strength of the additive area is 252.72 MPa and the elongation after fracture is 11.82％.The optimal process parameters were modified according to the process,followed by five-layer lateral stir friction additive manufacturing tests to analyse the mechanical property characterization.The results show that the tensile properties of the additive area are similar to those of the base metal with the modified optimum process parameters,and the fracture mode of the tensile specimen is ductile fracture.The hardness of the latter additive layer is higher than that of the previous one.
万方数据
维普
