The influence of post-aging treatment on the microstructure and micromechanical behaviors of additively manufactured maraging steel investigated by in situ high-energy X-ray diffraction

被引：11
作者：
Li, Yang [1 ]
Yu, Jingyue [1 ]
Li, Shilei [1 ]
Wang, Shengjie [1 ]
Ren, Yang [2 ]
Yang, Ke [3 ]
Wang, Yan-Dong [1 ,4 ]
机构：
[1] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
[2] City Univ Hong Kong, Dept Phys, Hong Kong 999077, Peoples R China
[3] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
[4] Liaoning Acad Mat, Inst Mat Intelligent Technol, Shenyang 110004, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2024年 / 200卷
基金：
中国国家自然科学基金;
关键词：
Additive manufacturing; Maraging steel; Aging treatment; High-energy X-ray diffraction; INDUCED-PLASTICITY STEEL; MECHANICAL-PROPERTIES; HIGH-STRENGTH; RETAINED AUSTENITE; STAINLESS-STEELS; EVOLUTION; TEMPERATURE; PRECIPITATION; PERFORMANCE; PHASE;
D O I：
10.1016/j.jmst.2024.02.044
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure evolution and micromechanical behaviors of additively manufactured 18Ni300 maraging steel for both as-printed and aged one were investigated using the in situ high-energy X-ray diffraction (HE-XRD) technique with uniaxial tensile tests. The investigations revealed that the volume fraction of reversed austenite increased as the annealing temperature rose. The maraging steel was strengthened by eta-Ni3 Ti precipitates, where the aged maraging steel had a higher UTS value of -1860 MPa than -1135 MPa in the as-printed one, but sacrificed more than half of ductility (from -8.6 % to -4.0 %). The austenite in aged steel presents more stability induced by the aging process than that in as-printed counterpart, which has a higher critical martensitic transformation stress of -1200 MPa than that of -780 MPa in as-printed steel. The austenite grains orientated with [200]//LD yield before the macroyielding and preferential martensite transformation occurs. This study provides further insight into the intricated micromechanical responses of additively manufactured 18Ni300 maraging steel, enlarging the scope of its adaptation and application. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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页码：1 / 12
页数：12
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