Growth of Ω Plates and Its Effect on Mechanical Properties in Al-Cu-Mg-Ag Alloy with High Content of Silver

被引：11
作者：
Gu, Yanxia [1 ,2 ]
Liu, Zhiyi [1 ,2 ]
Yu, Dier [1 ,2 ]
Liu, Bingbin [3 ]
Lin, Mao [1 ,2 ]
Zeng, Sumin [1 ,2 ]
机构：
[1] Cent S Univ, Key Lab Nonferrous Met Mat Sci & Engn, Minist Educ, Changsha 410083, Hunan, Peoples R China
[2] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[3] Macao Univ Sci & Technol, Fac Informat Technol, Macao, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2013年 / 22卷 / 06期
关键词：
Al-Cu-Mg-Ag alloy; Growth; Mechanical properties; Omega plates; COLD WORK; PHASE; AL-CU-MG-(AG); STABILITY; PRECIPITATION; TEMPERATURES; TOUGHNESS; EVOLUTION; STRENGTH;
D O I：
10.1007/s11665-013-0472-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, the effects of thermal exposure at 200 A degrees C on the mechanical properties and the growth of Omega plates in an Al-Cu-Mg-Ag alloy with high content of silver were investigated. It was shown that the tensile strength of the exposed alloy decreased with the increase of the mean lengths of Omega precipitates and the decrease in the volume fraction of the Omega phase. The decrease in tensile strength of the 165 A degrees C/14-h-aged samples was less significant than that of 165 A degrees C/2-h-aged samples because the lengthening rate of Omega plates was lower and the number density of Omega precipitates was higher in the 165 A degrees C/14 h-aged samples. The thickening rate of Omega plates was very low during exposure at 200 A degrees C because of high content of silver, and the growth behavior was caused mainly by the lengthening of Omega plates within the habit plane. High content of silver inhibited the thickening of Omega plates and promoted the lengthening of Omega precipitates during exposure.
引用
收藏
页码：1708 / 1715
页数：8
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