Chemical composition and stress dependence of the elastic properties of κ-(Fe,Mn)3AlC thin films

被引：7

作者：

Herrig, Friederike ^{[1
]}

Music, Denis ^{[1
]}

Ruess, Holger ^{[1
]}

Ravensburg, Anna L. ^{[1
]}

Poellmann, Peter J. ^{[1
]}

Schneider, Jochen M. ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Mat Chem, Kopernikusstr 10, D-52074 Aachen, Germany

来源：

SCRIPTA MATERIALIA | 2018年 / 153卷

关键词：

Steels; Carbides; Phase composition; Structure-property relationship; Elastic behavior; INITIO MOLECULAR-DYNAMICS; AUGMENTED-WAVE METHOD; MN LIGHTWEIGHT STEEL; LOW-DENSITY STEEL; PHASE-EQUILIBRIA; C SYSTEM; MECHANICAL-BEHAVIOR; MAGNETIC-PROPERTIES; KAPPA-CARBIDES; HIGH-STRENGTH;

D O I：

10.1016/j.scriptamat.2018.04.044

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Although the formation of nanosized kappa-precipitates in austenitic Fe-Mn-Al-C matrices cause coherency strains and affect both strength and ductility, the composition and stress dependence of the elastic properties has not been studied systematically for (Fe,Mn)(3)AlC (Pm (3) over barm). An elastic modulus decrease of 49 and 64 GPa upon C and Al-vacancy formation, respectively, was predicted and experimentally verified and is caused by concomitant weakening in average bond energy. The predicted increase of up to 33 GPa in elastic modulus due to the presence of 2 GPa compressive stress was corroborated experimentally and can be understood by pressure induced bond strengthening. (C)2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：49 / 53

页数：5

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