文献类型：期刊文献

英文题名：Heat treatment-induced microstructural transformations and strengthening mechanisms in laser powder bed fusioned 15-5PH stainless steel

作者：Chen, Bin[1,2,3];Huang, Zhenghua[1,4];Li, Bo[1,2,5];Li, Jianing[1,3];Liu, Jianye[4];Niu, Liuhui[4]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Addit Mfg & Intelligent Equipment Res Inst, Shanghai 200237, Peoples R China;[3]Shandong Jianzhu Univ, Sch Mat Sci & Engn, Jinan 250101, Shandong, Peoples R China;[4]Guangdong Hanbang 3D Technol Co Ltd, Guangdong Prov Engn & Technol Res Ctr Met 3D Print, Zhongshan 528427, Peoples R China;[5]Shanghai Collaborat Innovat Ctr High End Equipment, Shanghai 200237, Peoples R China

年份：2024

卷号：33

起止页码：9109

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：;EI(收录号：20244817447693);WOS:【SCI-EXPANDED(收录号:WOS:001406714600001)】；

基金：This work was financially supported by Key-Area Research and Development Program of Guangdong Province (No. 2023B0909020004), Project of Innovation Research Team in Zhongshan (No. CXTD2023006), Natural Science Foundation of Guangdong Province (No. 2023A1515011573), and Major Science and Technology Project of Zhongshan City (No. 2022A1006),AECC Industry-University-Research Cooperation Project, China (HFZL2023CXY024); Research Project of Shanghai Municipal Administration for Market Regulation, in China (Grant No. 2023-46).

语种：英文

外文关键词：Additive manufacturing; Heat treatment; Microstructure; Wear performance; Mechanical properties; Strengthening mechanism

摘要：This study systematically examined the effects of solution treatment-aging (ST-AT) and aging treatment alone (AT) on the microstructure, wear resistance, and mechanical properties of 15-5PH stainless steel fabricated via laser powder bed fusion. The underlying strengthening mechanisms were also analyzed. Experimental results revealed that AT samples maintained a dual-phase structure of alpha-martensite and gamma-austenite, with partially heterogeneous layered structures. In contrast, the ST-AT samples underwent complete transformation to single alpha-martensite phase, characterized by flat and noodle-like martensite. Performance testing revealed a notable increase in hardness for both ST-AT and AT samples, though wear resistance slightly decreased. The ultimate tensile strength and yield strength (YS) of the AT and ST-AT sample reached 1384 MPa, 977 MPa, and 1398 MPa, 1264 MPa, respectively, accompanied by slight reductions in elongation to fracture. Dislocation strengthening accounted for 60.3% of the YS increase in ST-AT samples, with a theoretical YS of 1295 MPa closely matching experimental results.