Effects of nanoprecipitates on mechanical properties in an ultra-high strength maraging stainless steel

被引：2

作者：

Jiang, Weiguo ^{[1
]}

Li, Junpeng ^{[1
]}

Zhang, Yang ^{[1
]}

Li, Xinghao ^{[1
]}

Luan, Junhua ^{[2
]}

Jiao, Zengbao ^{[3
]}

Liu, Chain Tsuan ^{[2
]}

Zhang, Zhongwu ^{[1
]}

机构：

[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China

[2] City Univ Hong Kong, Dept Mech Engn, Interuniv Atom Probe Tomog Unit 3D, Hong Kong, Peoples R China

[3] Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2025年 / 222卷

关键词：

Maraging stainless steel; Nanoprecipitates; Tensile properties; Strengthening mechanism; TEMPERING TEMPERATURE; PRECIPITATION; MICROSTRUCTURE; DUCTILITY; BEHAVIOR; MORPHOLOGY; EVOLUTION; STRAIN; ALLOYS; MODEL;

D O I：

10.1016/j.matchar.2025.114837

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new maraging stainless steel (MSS) with excellent balance of strength and ductility was designed. The ultimate tensile strength (UTS) of the MSS after aging at 500 degrees C for 100 h reaches 2068 MPa, with a total elongation of 9.3 % and a uniform elongation of 3.1 %. Compared with the unaged MSS, the MSS steel aged for 100 h showed an increase of 783 MPa in UTS, with only a slight reduction in ductility. After aging for 100 h, the sizes of Fe2Mo, Ni3Nb, and alpha'-Cr phases are 21.5 nm, 6.6 nm, and 5.4 nm, respectively. Long time aging for 100 h, Fe2Mo grows significantly along with a large misfit of 16 % between martensite matrix and Fe2Mo. Upon deformation, the dislocation density in MSS aged for 100 h increases from 22.9 x 1014 m- 2 to 37.8 x 1014 m- 2, resulting in a high strain hardening rate. In contrast, the dislocation density in the unaged MSS increases slightly from 33.4 x 1014 m- 2 to 34.1 x 1014 m- 2.

引用

页数：15

共 70 条

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