Grain boundary evolution of highly nanotwinned alloys: Effect of initial twinned microstructure

被引：10
|
作者：
Bahena, Joel A. [1 ]
Juarez, Theresa [1 ]
Velasco, Leonardo [2 ]
Hodge, Andrea M. [1 ,3 ]
机构：
[1] Univ Southern Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA
[2] Karlsruhe Inst Technol, Inst Nanotechnol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
[3] Univ Southern Calif, Dept Chem Engn & Mat Sci, 925 Bloom Walk,HED 216, Los Angeles, CA 90089 USA
来源：
SCRIPTA MATERIALIA | 2021年 / 190卷
基金：
美国国家科学基金会;
关键词：
Twinning; Microstructural evolution; Grain growth; Nanostructured materials; THERMAL-STABILITY; GROWTH TWINS; TENSILE BEHAVIOR; DRIVING FORCES; THIN-FILMS; RECRYSTALLIZATION; TEXTURE; MECHANISMS; METALS; ORIGIN;
D O I：
10.1016/j.scriptamat.2020.08.024
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effects of initial twinned microstructure on the grain growth behavior of four sputtered nanotwinned copper alloys were compared. As-deposited films were characterized by transmission electron microscopy and the microstructural evolution of the annealed samples was investigated through electron backscatter diffraction. Texture showed a pronounced effect, where films with strong {111} textures exhibited abnormal grain growth that was not observed in a randomly textured film. Additionally, the stability induced by twin boundaries appears to be limited, as the excess energy generated by a large twin density could drive the early onset of abnormal grain growth and recrystallization. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：27 / 31
页数：5
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