Mechanical Properties Of 316L Material And Unit Cell Structure Based On Selective Laser Melting Technology

In recent years,Additive Manufacturing(AM)technology has been applied in various Manufacturing fields,especially in the aerospace Manufacturing field,AM technology has become the main production method to manufacture high precision parts.And AM technology leads the integration of design and production of new industrial production mode,greatly shortening the production cycle.Selective Laser Melting(SLM)technology as a typical metal additive manufacturing technology,its manufacturing performance under different processes has also been paid close attention,and The 316L stainless steel material prepared by SLM has become the focus of AM material research due to its excellent strength and mechanical properties.Therefore,to explore the appropriate process parameters and post-treatment process in SLM preparation has become an important research direction for the AM technology.However,the application of SLM technology in industrial production also needs to consider the production cost,and the use of as few materials as possible to meet the load-bearing requirements has become the research idea of SLM manufacturing lightweight design.At this time,the Lattice Structure with unique performance has been developed.The design freedom afforded by AM technology when subjected to specific loads offers great potential for SLM lattice structures.This paper mainly evaluates the comprehensive mechanical properties of 316L stainless steel material prepared by SLM,and evaluates the bearing capacity of specific SLM lattice under specific load.The main work of this paper is as follows:(1)Through quasi-static tensile test,quasi-static compression test and fatigue test,the comprehensive mechanical properties of 316L materials prepared by SLM were tested.The influence of post-HIP heat treatment at 900? on SLM316L material grade was analyzed and evaluated.(2)The fatigue life of 316L prepared by SLM was predicted and analyzed.The three-parameter Weibull distribution model was used in the prediction,and the dynamic recombination multi-population particle swarm optimization algorithm was used to optimize the fatigue life,which proved that this method was an alternative method in the life model value search.(3)In lattice structure,Face centered cubic of Z-Struts(FCC)structure FCCZ(Face centred cubic of Z-Struts)was used to conduct mechanical test on the forming structure of SLM process,and its mechanical performance was evaluated,and gibsonAshby model was used to verify it.Finally,lattice structure is applied to shoe mold,which provides an effective method for lightweight design of additive manufacturing,and has research and engineering value.