激光选区熔化17-4PH不锈钢的动态性能研究  

Study on Dynamic Property of Laser Selective Melting of 17-4PH Stainless Steel

作　　者：程青叶 王潭 舒旗 周刚毅[1,2] 董新龙[1,2] Cheng Qingye;Wang Tan;Shu Qi

机构地区：[1]宁波大学冲击与安全工程教育部重点实验室,浙江宁波315211 [2]宁波大学机械工程与力学学院,浙江宁波315211

出　　处：《机械制造》2023年第11期49-53,共5页Machinery

基　　金：冲击与安全工程教育部重点实验室开放课题(编号:CJ202013)。

摘　　要：激光选区熔化制造的不锈钢结构及材料的动态性能测试研究是工程结构设计与应用分析的基础。采用液压伺服材料试验机和霍普金森压杆对激光选区熔化17-4PH不锈钢的准静态和动态压缩性能进行研究,分析17-4PH不锈钢本构特性的动态应变率效应。研究结果显示,激光选区熔化17-4PH不锈钢具有应变率强化效应,随应变率增大,流动应力增大,应变率敏感因数为62.598。微观结构分析表明,17-4PH不锈钢发生绝热剪切带破坏。The dynamic performance test and research of stainless steel structure and material manufactured by selective laser melting is the basis for design and application analysis of engineering structure.The quasi-static and dynamic compression properties of selective laser melting of 17-4PH stainless steel were studied by hydraulic servo material testing machine and Hopkinson pressure rod,and the dynamic strain rate effect of constitutive characteristic of 17-4PH stainless steel was analyzed.The results show that the selective laser melting of 17-4PH stainless steel has a strain rate strengthening effect,with the increase of strain rate,the flow stress increases,and the strain rate sensitivity factor is 62.598.Microstructural analysis shows that 17-4PH stainless steel undergoes adiabatic shear band failure.

关 键 词：激光选区熔化 不锈钢 动态性能 研究 

分 类 号：TH140.7[一般工业技术—材料科学与工程]