Influence of solid solution time on microstructure and precipitation strengthening of novel maraging steels

doi:10.1016/j.msea.2024.147535

IMR OpenIR

	Influence of solid solution time on microstructure and precipitation strengthening of novel maraging steels
	Xu, T. Z.1; Wang, T.1; Wang, M. S.2; Zhang, S.1; Zhang, C. H.1; Wu, C. L.1; Sun, X. Y.3; Chen, H. T.3; Chen, J.3
通讯作者	Zhang, S.(songzhang_sy@163.com)
	2025
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	920 页码:13
摘要	Effective subsequent heat treatment is crucial for achieving the desired microstructure and excellent mechanical properties in laser-deposited high-performance maraging steel. In this paper, we systematically investigate the synergistic relationship and tuning mechanism of different solution treatment times on the microstructureproperty synergy of new maraging steels fabricated using laser direct energy deposition (LDED). To determine the optimal heat treatment process, solution treatment was conducted at 840 degrees C for varying durations, followed by aging at 530 degrees C for 2 h to induce precipitation strengthening. The results indicate that after 2 h of solution treatment, the alloy exhibits optimal ductility with an elongation of 7.90 % +/- 0.15 %, attributed to the refinement of the martensitic matrix and precipitated phases, along with the formation of a small amount of residual austenite. When the solution treatment time is extended to 4 h, the alloy achieves its highest tensile strength, reaching 1958 +/- 24 MPa. However, the elongation decreases to 7.31 % +/- 0.12 % due to the coarsening of the martensite and secondary phase particles. After 6 h of solution treatment, significant coarsening and aggregation of the martensite and Fe2Mo intermetallic compounds markedly reduce the hardness, strength, and toughness of the alloy. By adjusting the solution treatment time, the size, morphology, and distribution of the martensitic matrix, Fe2Mo, and nanoscale precipitated phases play a critical role in the strengthening and fracture processes. Therefore, optimizing the precipitation behavior of the martensitic matrix and Fe2Mo intermetallic compounds through rational solution heat treatment is key to enhancing the mechanical properties of laser-deposited new maraging steels.
关键词	Laser direct energy deposition Maraging steel Solution treatment Tensile strength Microhardness
资助者	National Key Research and Development Program of China ; General Project of Guangxi Natural Science Foundation ; Shenyang Science and Technology
DOI	10.1016/j.msea.2024.147535
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2023YFB4606605] ; General Project of Guangxi Natural Science Foundation[2023GXNSFAA026421] ; Shenyang Science and Technology[22-101-0-16]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001360419400001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/191633
专题	中国科学院金属研究所
通讯作者	Zhang, S.
作者单位	1.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shangyang, Peoples R China 3.Shenyang Dalu Laser Technol Co Ltd, Shenyang 110136, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Xu, T. Z.,Wang, T.,Wang, M. S.,et al. Influence of solid solution time on microstructure and precipitation strengthening of novel maraging steels[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2025,920:13.
APA	Xu, T. Z..,Wang, T..,Wang, M. S..,Zhang, S..,Zhang, C. H..,...&Chen, J..(2025).Influence of solid solution time on microstructure and precipitation strengthening of novel maraging steels.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,920,13.
MLA	Xu, T. Z.,et al."Influence of solid solution time on microstructure and precipitation strengthening of novel maraging steels".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 920(2025):13.