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

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外文摘要：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 ℃ and 700 ℃ for 6 h.Furthermore,the tensile strength and elongation increased after the heat treatment temperature due to the combined effect of dislocations,twins,and ε-Cu precipitated phases.Notably,after heat treatment at 700 ℃,the SLM4.5Cu sample exhibited an abnormal rise in tensile strength and elongation.This finding suggests that the diffusion strengthening caused by ε-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.

外文关键词：

Selective laser meltingCu-bearing stainless steel(SS)Heat treatmentMechanical properties

作者：

Huan Yang、Ying Liu、Jianbo Jin、Kunmao Li、Junjie Yang、Lingjian Meng、Chunbo Li、Wencai Zhang、Shengfeng Zhou

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作者单位：

Sino-German College of Intelligent Manufacturing,Shenzhen Technology University,Shenzhen 518118,China

Institute of Advanced Wear and Corrosion Resistance and Functional Materials,Jinan University,Guangzhou 510632,China

Department of Orthopedics,First Affiliated Hospital of Jinan University,Guangzhou 510632,China

基金：

国家自然科学基金重大项目Project of MOE Key Lab of Disaster Forecast and Control in Engineering in Jinan UniversityGuangdong Province Basic and Applied Basic Research FoundationGuangxi Key Laboratory of Information MaterialsOpen Project Program of the State Key Laboratory of Mechanical Transmissions in Chongqing UniversityOpen Project Program of Wuhan National Laboratory for Optoelectronics中央高校基本科研业务费专项Stable Support Project of Shenzhen Higher Education InstitutionsStable Support Project of Transversal collegeenterprise cooperation projects

项目编号：

92166112202009040062020B1515420004211003-KSKLMT-MSKFKT-2021022021WNLOKF01021622110SZWD2021008HT20220613002

出版年：

2024

DOI：

10.1007/s40195-023-01643-3

金属学报(英文版)

中国金属学会

金属学报(英文版)

CSTPCD

影响因子：0.77

ISSN：1006-7191

年,卷(期)：2024.37(1)

参考文献量54