First-principles study of solid-solution hardening in steel alloys

被引：32

作者：

Zhang, Hualei ^{[1
]}

Johansson, Borje ^{[1
,2
]}

Ahuja, Rajeev ^{[1
,2
]}

Vitos, Levente ^{[1
,2
,3
]}

机构：

[1] Royal Inst Technol, Dept Mat Sci & Engn, SE-10044 Stockholm, Sweden

[2] Uppsala Univ, Div Mat Theory, Dept Phys & Mat Sci, SE-75120 Uppsala, Sweden

[3] Res Inst Solid State Phys & Opt, H-1525 Budapest, Hungary

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2012年 / 55卷

基金：

欧洲研究理事会; 匈牙利科学研究基金会; 瑞典研究理事会;

关键词：

Steel alloys; Hardness; Density functional theory; Iron alloys; IRON-ALLOYS; FE; SCIENCE; MG;

D O I：

10.1016/j.commatsci.2011.12.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Materials with excellent mechanical properties, such as light mass combined with remarkable hardness and toughness, are technologically important not least for automotive and other transport applications. Solid solution strengthening, due to dislocation pinning by impurities, is an effective route to enhance the intrinsic hardness of alloys. In the present work, we use advanced quantum theory to reveal the mechanical characteristics of iron alloys within and beyond their thermodynamic stability fields. Among the considered alloying elements, magnesium strongly reduces the density of the host alloys and significantly enhances the hardness. Our findings suggest that stainless steel grades containing a few percent of magnesium are promising engineering materials for high-strength and light-weight designs. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：269 / 272

页数：4

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