Superior thermal stability of coherent twin boundaries in nanotwinned metals

被引：195
|
作者：
Zhang, X. [1 ]
Misra, A. [2 ]
机构：
[1] Texas A&M Univ, Dept Mech Engn, Mat Sci & Engn Program, College Stn, TX 77843 USA
[2] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA
来源：
SCRIPTA MATERIALIA | 2012年 / 66卷 / 11期
关键词：
Twinning; Hardness; Thermally activated processes; Grain boundary; STEEL THIN-FILMS; NANOSCALE GROWTH TWINS; CENTERED-CUBIC METALS; GAS DEPOSITION METHOD; NANO-SCALE TWINS; MECHANICAL-BEHAVIOR; NANOCRYSTALLINE MATERIALS; GRAIN-GROWTH; RESIDUAL-STRESSES; MAXIMUM STRENGTH;
D O I：
10.1016/j.scriptamat.2012.01.026
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We compare the thermal stability of nanotwinned metals to their nanocrystalline counterparts. The thermal stability of a coherent twin boundary is superior to that of a high-angle grain boundary as the energy stored at twin boundaries is an order of magnitude lower than at high-angle grain boundaries. The stability of nanotwins sheds light on the use of these materials for relatively higher-temperature applications, where the retention of twins can enhance the mechanical strength of metallic materials. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：860 / 865
页数：6
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