The influence of interstitial carbon on the γ-surface in austenite

被引：40

作者：

Gholizadeh, Hojjat ^{[1
,2
]}

Draxl, Claudia ^{[1
]}

Puschnig, Peter ^{[1
]}

机构：

[1] Univ Leoben, Chair Atomist Modelling & Design Mat, A-8700 Leoben, Austria

[2] Mat Ctr Leoben Forsch GmbH, A-8700 Leoben, Austria

来源：

ACTA MATERIALIA | 2013年 / 61卷 / 01期

关键词：

Ab initio; Stacking-fault energy; gamma-surface; Interstitial carbon; Austenite; STACKING-FAULT ENERGIES; STAINLESS-STEELS; TRIP/TWIP STEELS; IRON; ALLOYS;

D O I：

10.1016/j.actamat.2012.09.066

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The intrinsic stacking-fault energy (SFE) is a crucial parameter for understanding the plastic deformation behavior of face-centered cubic materials such as austenitic steels. In order to investigate the influence of interstitial carbon on the SFE of iron, we perform ab initio calculations within the framework of density functional theory. By utilizing the linearized augmented planewave method, we compute the SFE for a variety of carbon concentrations, i.e. Fe, Fe24C and Fe3C, as well as different carbon locations with respect to the stacking-fault plane. Our results demonstrate a strong influence of both parameters on the SFE, in agreement with previous experimental and theoretical reports. Moreover, we compute the generalized SFE (also known as the gamma-surface), which provides information about the behavior of the material under shear stress. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：341 / 349

页数：9

共 25 条

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