Effect of Pre-deformation on Nanoscale Precipitation and Hardness of a Maraging Stainless Steel

被引：1

作者：

Zhou, Xinlei ^{[1
,2
]}

Wang, Bin ^{[3
]}

Zeng, Tianyi ^{[1
,2
]}

Yan, Wei ^{[2
]}

Luan, Junhua ^{[4
]}

Wang, Wei ^{[2
]}

Yang, Ke ^{[2
]}

Jiao, Zengbao ^{[5
]}

机构：

[1] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China

[2] Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China

[3] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China

[4] City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China

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

来源：

ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2022年 / 35卷 / 12期

关键词：

Maraging stainless steel; Pre-deformation; Precipitation hardening; Atom probe tomography; FE-CR; STRENGTHENING BEHAVIOR; DISLOCATION DENSITY; LATH MARTENSITE; MO; MICROSTRUCTURE; EVOLUTION; NI; NICKEL; CO;

D O I：

10.1007/s40195-022-01440-4

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effect of pre-deformation on nanoscale precipitates and hardness of a maraging stainless steel strengthened by the co-precipitation of Ni3Ti, Mo-enriched and Cr-enriched precipitates was systematically studied using electron back scattered diffraction, transmission electron microscopy and atom probe tomography (APT). Hardness measurements showed that the hardness of specimen with a deformation ratio of 90% peaked at HV 718 aged for 24 h, which is higher than that in the undeformed specimen (HV 603) aged for 72 h at 480 degrees C. APT characterization revealed that pre-deformation could shorten the incubation time of the Mo-enriched and Cr-enriched precipitates. At the early-aged stage, pre-deformation increased the stain energy that inhibited the nucleation of Ni3Ti precipitates, but accelerated the rejection of Mo from Ni-Ti clusters. Besides, the strengthening model indicated that strain hardening (43%) makes a larger contribution to the hardness at the early-aged condition, while precipitation hardening (58%) has most contribution to the hardness at the peak-aged conditition.

引用

页码：2089 / 2100

页数：12

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