The influence of preaging on the strength and precipitation behavior of a deformed Al-Cu-Mg-Ag alloy

被引：46
作者：
Bai, Song [1 ,2 ]
Yi, Xinlei [2 ]
Liu, Zhiyi [1 ,2 ]
Wang, Jian [2 ]
Zhao, Juangang [2 ]
Ying, Puyou [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
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 764卷
关键词：
Atom probe tomography; Omega Phase; Al-Cu-Mg-Ag alloy; Preaging; 3-DIMENSIONAL ATOM-PROBE; TRANSMISSION ELECTRON-MICROSCOPY; OMEGA-PHASE; ELEVATED-TEMPERATURES; MICROSTRUCTURAL EVOLUTION; DEPENDENT PRECIPITATION; MECHANICAL-PROPERTIES; AL-CU-MG-(AG) ALLOYS; COLD WORK; TOMOGRAPHY;
D O I：
10.1016/j.jallcom.2018.06.046
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
It is well known that deformation prior to artificial aging considerably decreases the strength properties of Al-Cu-Mg-Ag alloys by suppressing the formation of the main strengthening Omega precipitates. This negative effect is the as-yet unresolved obstacle for the wide applications of Al-Cu-Mg-Ag alloys. In this work, preaging prior to deformation is conducted to evaluate its possible influence on improving the typical microstructure and strength of deformed Al-Cu-Mg-Ag alloy. Quantitative transmission electron microscopy (TEM) and atom probe tomography (APT) analysis of the initial solute clustering and subsequent Omega precipitation of the deformed alloy with and without preaging indicate that preaging ensures strong Mg-Ag co-clustering and hence benefits the dense precipitation of Omega phase in deformed Al-Cu-Mg-Ag alloy. Naturally, the strength of 1% stretched Al-Cu-Mg-Ag alloy is obviously enhanced by preaging. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：62 / 72
页数：11
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