Interface-facilitated stable plasticity in ultra-fine layered FeAl/FeAl2 micro-pillar at high temperature

被引：10

作者：

Li, Lulu ^{[1
]}

Beyerlein, Irene J. ^{[2
]}

Han, Weizhong ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Ctr Adv Mat Performance Nanoscale, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[2] Univ Calif Santa Barbara, Dept Mech Engn, Mat Dept, Santa Barbara, CA 93106 USA

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2021年 / 73卷

基金：

中国国家自然科学基金;

关键词：

Fe-Al alloy; Compression; High-temperature; Interface; Dislocation; FE-AL SYSTEM; MECHANICAL-PROPERTIES; COATINGS; STEEL; PHASE; DIFFUSION;

D O I：

10.1016/j.jmst.2020.09.018

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fe-Al compounds possess a combination of high strength and corrosion resistance at high temperatures. However, increasing Al content to make them lighter results in embrittlement. Here, we investigate the high-temperature behavior of a novel, lightweight, ultra-fine-layered FeAl/FeAl2 material. We report a transition from unstable to stable plasticity at 450 degrees C. Below 450 degrees C, deformation is dominated by localized shear deformation within the soft FeAl layers, while above 450 degrees C, it proceeds by co-deformation between FeAl and the brittle FeAl2 layers. We show that co-deformation is associated with the temperature at which the interface converts from sliding to sourcing dislocations for FeAl2. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：61 / 65

页数：5