首页|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

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

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The microstructure evolution and micromechanical behaviors of additively manufactured 18Ni300 marag-ing steel for both as-printed and aged one were investigated using the in situ high-energy X-ray diffrac-tion(HE-XRD)technique with uniaxial tensile tests.The investigations revealed that the volume frac-tion of reversed austenite increased as the annealing temperature rose.The maraging steel was strength-ened by η-Ni3Ti 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 macro-yielding 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.

Additive manufacturingMaraging steelAging treatmentHigh-energy X-ray diffraction

Yang Li、Jingyue Yu、Shilei Li、Shengjie Wang、Yang Ren、Ke Yang、Yan-Dong Wang

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Beijing Advanced Innovation Center for Materials Genome Engineering,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing Beijing 100083,China

Department of Physics,City University of Hong Kong,Hong Kong 999077,China

Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China

Institute for Materials Intelligent Technology,Liaoning Academy of Materials,Shenyang 110004,China

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2024

10.1016/j.jmst.2024.02.044

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.200(33)