Structural and phase transformation in a TWIP steel subjected to high pressure torsion

被引：28

作者：

Abramova, M. M. ^{[1
]}

Enikeev, N. A. ^{[1
]}

Kim, J. G. ^{[2
]}

Valiev, R. Z. ^{[1
]}

Karavaeva, M. V. ^{[1
]}

Kim, H. S. ^{[2
]}

机构：

[1] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, K Marksa Str 12, Ufa 450000, Russia

[2] Pohang Univ Sci & Technol POSTECH, Dept Mat Sci & Engn, Pohang 790784, South Korea

来源：

MATERIALS LETTERS | 2016年 / 166卷

基金：

新加坡国家研究基金会;

关键词：

Ultra-fine grained materials; TWIP steel; High pressure torsion; Phase transformation; Grain boundaries; SEVERE PLASTIC-DEFORMATION;

D O I：

10.1016/j.matlet.2015.12.095

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the changes in microstructure and phase composition in a high-Mn steel due to severe plastic deformation realized via high pressure torsion at different temperatures. Severe straining conducted at 20 degrees C and 300 degrees C allowed producing nanostructural states with a mean grain size less than 100 nm. Besides, straining at room temperature leaded to formation of strain-induced e-martensite while at 300 degrees C fully austenite state was produced. Despite the revealed differences both states demonstrated similar, notably increased level of hardness up to similar to 580 Hv. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：321 / 324

页数：4

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