Dislocation interaction with Ω phase in crept Al-Cu-Mg-Ag alloys

被引：22
作者：
Bai, Song [1 ,2 ]
Di, Hongshuang [1 ]
Liu, Zhiyi [2 ]
机构：
[1] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China
[2] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 651卷
基金：
中国国家自然科学基金;
关键词：
Aluminum alloys; Dislocation; Thickening; Omega phase; Creep; STRENGTH ALUMINUM-ALLOYS; TRANSMISSION ELECTRON-MICROSCOPY; PRECIPITATES OMEGA; MECHANICAL-PROPERTIES; DEFORMATION; BEHAVIOR; GROWTH; SLIP; MICROSTRUCTURE; AL-CU-MG-(AG);
D O I：
10.1016/j.msea.2015.10.031
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The interaction between dislocations and the plate-like Omega phase in crept Al-Cu-Mg-Ag alloys is well investigated by electron microscope technique. Our results shows that Omega phase are sheared by dislocation during creep. Except for the small shearing steps, large steps produced by multiple dislocation shearing along the same slip planes are undoubtedly observed. These shearing steps act as the potential growth ledges and considerably accelerate the thickening of Omega phase during creep. High resolution transmission electron microscopy analysis confirms the interface created by dislocation shearing remains coherent. In addition, the slip system in Omega phase is (010)(Omega)[001](Omega). (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：399 / 405
页数：7
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