Effect of Heat Treatment on Microstructure and Mechanical Behavior of Cu-Bearing 316L Stainless Steel Produced by Selective Laser Melting

查看全文 作　　者：Huan [1]Yang;Ying [2]Liu;Jianbo [2]Jin;Kunmao [2]Li;Junjie [2]Yang;Lingjian [1]Meng;Chunbo [1]Li;Wencai [3]Zhang;Shengfeng [2]Zhou 机构地区：[1]Sino-German College of Intelligent Manufacturing,Shenzhen Technology University,Shenzhen,518118,China;[2]Institute of Advanced Wear and Corrosion Resistance and Functional Materials,Jinan University,Guangzhou,510632,China;[3]Department of Orthopedics,First Affiliated Hospital of Jinan University,Guangzhou,510632,China 出　　处：《Acta Metallurgica Sinica(English Letters)》索引2024年第37卷第1期,共12页 基　　金：This work was financially supported by the Major Research Plan of the National Natural Science Foundation of China(Grant No.92166112);the Project of MOE Key Lab of Disaster Forecast and Control in Engineering in Jinan University(Grant No.20200904006);the Guangdong Province Basic and Applied Basic Research Foundation(Grant No.2020B1515420004);the Guangxi Key Laboratory of Information Materials(Grant No.211003-K);the Open Project Program of the State Key Laboratory of Mechanical Transmissions in Chongqing University(Grant No.SKLMT-MSKFKT-202102);the Open Project Program of Wuhan National Laboratory for Optoelectronics(Grant No.2021WNLOKF010);the supported by the Fundamental Research Funds for the Central Universities(Grant No.21622110);the Stable Support Project of Shenzhen Higher Education Institutions(Grant No.SZWD2021008),;the Stable Support Project of Transversal college-enterprise cooperation projects(Grant No.HT20220613002). 摘　　要：Cu-bearing stainless steels(SSs)with high strength,excellent plasticity,and effective antimicrobial properties hold significant potential for applications in the marine industry.In this study,Cu-bearing SSs with copper ranging from 0 to 6.0 wt%were successfully prepared using selective laser melting(SLM)technology.For the Cu-bearing SSs with different copper contents,the effect of heat treatment on the microstructural and mechanical behaviors was studied systematically.Microstructural observations revealed that the subgrain size of Cu-bearing SSs increased with heat treatment at 500°C and 700°C for 6 h.Furthermore,the tensile strength and elongation increased after the heat treatment temperature due to the combined effect of dislocations,twins,andε-Cu precipitated phases.Notably,after heat treatment at 700°C,the SLM4.5Cu sample exhibited an abnormal rise in tensile strength and elongation.This finding suggests that the diffusion strengthening caused byε-Cu precipitates exceeded the stacking fault energy.Consequently,the tensile strength and elongation reached 693.32 MPa and 56.94%,respectively.This work provides an efficient approach for preparing Cu-bearing SSs with exceptional strength and plasticity. 关 键 词：Selective laser melting Cu-bearing stainless steel(SS) Heat treatment Mechanical properties