Precipitation in a Cu- Cr- Zr- Mg alloy during aging

被引：87
|
作者：
Cheng, J. Y. [1 ]
Shen, B. [1 ]
Yu, F. X. [1 ]
机构：
[1] Nanchang Univ, Sch Mat Sci & Engn, Nanchang 330031, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2013年 / 81卷
基金：
中国国家自然科学基金;
关键词：
Precipitation sequence; Aging; Ordering; Orientation relationship; Cu- Cr- Zr- Mg alloy; DIFFRACTION CONTRAST; SYSTEM ALLOYS; MICROSTRUCTURE; BEHAVIOR; CHROMIUM; COPPER; RECRYSTALLIZATION; ADDITIONS; PHASE;
D O I：
10.1016/j.matchar.2013.04.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The precipitation processes in a Cu-0.69Cr-0.10Zr-0.02Mg alloy aged at 450 degrees C and 550 degrees C have been investigated by transmission electron microscopy and high resolution transmission electron microscopy. The precipitation sequence in this alloy aged at 450 degrees C is: supersaturated solid solution -> Guinier-Preston zone (fcc Cr-rich phase) -> ordered fcc Cr-rich phase -> ordered bcc Cr-rich phase. The precipitation sequence in this alloy aged at 550 degrees C is: supersaturated solid solution -> ordered fcc Cr-rich phase -> ordered bcc Cr-rich phase. In the evolution of decomposition, the orientation relationship between the precipitates and the Cu matrix changes from cube-on-cube to Nishiyama-Wassermann orientation. The ordering of Cr-rich precipitates facilitates the formation of the bcc precipitates and promotes the development of Nishiyama-Wassermann orientation. (C) 2013 Elsevier Inc. All rights reserved.
引用
收藏
页码：68 / 75
页数：8
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