Effects of nanostructural hierarchy on the hardness and thermal stability of an austenitic stainless steel

被引：16

作者：

Jiang, Wei ^{[1
]}

Cao, Yang ^{[1
]}

Jiang, Yingda ^{[2
]}

Liu, Yanfang ^{[1
]}

Mao, Qingzhong ^{[1
]}

Zhou, Hao ^{[1
]}

Liao, Xiaozhou ^{[3
]}

Zhao, Yonghao ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Nano & Heterogeneous Mat Ctr, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China

[2] Shenyang Ligong Univ, Sch Mat Sci & Engn, Shenyang 110159, Peoples R China

[3] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2021年 / 12卷

基金：

澳大利亚研究理事会; 中国国家自然科学基金;

关键词：

Steels; Thermal stability; Severe plastic deformation; Twinning; Mechanical properties; HIGH-PRESSURE TORSION; GRAIN-SIZE STABILIZATION; MICROSTRUCTURAL EVOLUTION; DEFORMATION; CU; STRENGTH; PRECIPITATION; PARTICLES; DUCTILITY; BEHAVIOR;

D O I：

10.1016/j.jmrt.2021.02.100

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An austenitic stainless steel was processed by high-pressure torsion, and formed a hierarchical nanostructure with ultrafine grains, ultrafine-precipitates, nano-twins and high densities of dislocations. As a result, the hierarchical nanostructure contributes collectively to the double hardness value of the austenitic stainless steel (514 +/- 44 HV) in comparison to the coarse-grained counterpart (217 +/- 11 HV). Both the nanostructural hierarchy and high hardness can be maintained at the temperatures up to similar to 600 degrees C. Annealing treatment at temperatures from 400 to 600 degrees C may induce recovery to the hierarchical nanostructure, resulting in a reduced microstructural heterogeneity and increased hardness for the high-pressure torsion processed steel. (C) 2021 The Authors. Published by Elsevier B.V.

引用

页码：376 / 384

页数：9

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