Effect of Heat Treatment on the Microstructure,Mechanical Properties and Corrosion Resistance of Selective Laser Melted 304L Stainless Steel

作     者：Fan Yang Daigen Zhu Menglei Jiang Hui Liu Shiri Guo Qingyan Wang Hui Wang Kai Zhang Aijun Huang Juan Hou Fan Yang;Daigen Zhu;Menglei Jiang;Hui Liu;Shiri Guo;Qingyan Wang;Hui Wang;Kai Zhang;Aijun Huang;Juan Hou

作者机构：School of Materials and ChemistryUniversity of Shanghai for Science and TechnologyShanghai200093China Institute for Advanced StudyChengdu UniversityChengdu610106China Monash Centre for Additive Manufacturing(MCAM)Monash UniversityNotting HillVIC3168Australia State Key Laboratory of Nuclear Power Safety Monitoring Technology and EquipmentShenzhen518172China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2022年第35卷第10期

页      面：1688-1702页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：sponsored by the National Natural Science Foundation of China(Grant No.52073176) the special funds for International Research on Science and Technology of Shenzhen(Project No.GJHZ2020073109520311) 

主　　题：Selective laser melting 304L stainless steel Heat treatment δferrite Mechanical properties Corrosion resistance 

摘      要：The influence of heat treatment holding temperatures from 600 to 1300℃ on the microstructure,mechanical properties and corrosion resistance in selective laser melted(SLMed)304L stainless steel is investigated in this *** results reveal that there is no remarkable microstructure change after holding at 600℃ for 2 h,while recrystallization leads to a slight decrease in grain size in the temperature range of 700–900℃.The heat treatment at temperatures from 1000 to 1300℃ for 2 h obviously affects the morphology of grains in SLMed 304L stainless *** effects of grain coarsening,delta-ferrite(δ)phases reduction and residual stress release during heat treatment lead to the reduction of yield strength and an increasing *** elongation of the samples heat treated at 800℃ for 2 h is,however,significantly decreased due to the increase in the amount of sigma(σ)phase.A remarkable increase in the amount ofδferrite results in an increase in yield strength but a decrease in ductility after heat treatment at 1300℃ for 2 *** corrosion resistance of the samples heat treated at 1300℃ is significantly improved due to the substantial reduction of brittle phase(σ).There is no obvious effect of the presence ofδferrite on corrosion behavior.