Effect of aging route on the precipitation behavior and thermal stability of Al-Cu-Mg-Ag alloy

被引：20

作者：

Yu, Zhe ^{[1
]}

Li, He ^{[1
]}

Cai, Pengzhan ^{[1
]}

Fu, Xiaoxiao ^{[1
,2
,3
]}

Feng, Zongqiang ^{[1
,2
,3
]}

Zhang, Ling ^{[1
,2
,3
]}

Wang, Jinsan ^{[4
]}

Xiao, Namin ^{[1
,4
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Int Joint Lab Light Alloys MOE, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Electron Microscopy Ctr, Chongqing 400044, Peoples R China

[3] Chongqing Univ, Shenyang Natl Lab Mat Sci, Chongqing 400044, Peoples R China

[4] Aero Engine Corp China, Beijing Inst Aeronaut Mat, Mat Valuat Ctr Aeronaut & Aeroengine Applicat, Beijing 100005, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2023年 / 23卷

基金：

中国国家自然科学基金;

关键词：

Al-Cu-Mg-Ag alloy; Thermal stability; Over-aging; Precipitate's diameter distribution; Ostwald ripening; ATOM-PROBE TOMOGRAPHY; MECHANICAL-PROPERTIES; OMEGA-PHASE; DEPENDENT PRECIPITATION; CREEP RESISTANCE; DESIGN;

D O I：

10.1016/j.jmrt.2023.01.140

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, the evolution of U plates during artificial aging and the effect of peak-aging treatment and over-aging treatment on the thermal stability of Al-Cu-Mg-Ag alloy were investigated by scanning electron microscopy (SEM) and transmission electron mi-croscopy (TEM). It was shown that the diameter distribution of U plates in the over-aged sample was narrower compared to the peak-aged one, which suppressed the Ostwald ripening in the over-aged sample. In addition, the U plates in the over-aged sample has a larger aspect ratio than that in the peak-aged sample, which makes it more likely for the soft impinge to inhibit the growth of the U plates. Quantitative analysis showed that after heat exposure, U plates in the over-aged sample contributed more to the yield strength compared to peak-aged sample. This study shows that better thermal stability can be obtained in exchange for a little loss of room temperature mechanical properties, improving the application potential of Al-Cu-Mg-Ag alloys.(c) 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

引用

页码：2010 / 2019

页数：10

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