Quantifying the effects of Sn on θ′-Al2Cu precipitation kinetics in Al-Cu alloys

被引：5
|
作者：
Zhang, Mingshan [1 ]
Wang, Junsheng [1 ,2 ]
Wang, Bing [1 ]
Xue, Chengpeng [1 ]
Qian, Feng [1 ]
Liu, Xiaoguang [3 ]
Guan, Shaokang [4 ]
机构：
[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
[2] Beijing Inst Technol, Adv Res Inst Multidisciplinary Sci, Beijing 100081, Peoples R China
[3] Univ Sci & Technol Beijing USTB, Sch Mat Sci & Engn, Beijing, Peoples R China
[4] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2021年 / 37卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Al-Cu cast alloys; trace element; microstructure; precipitation kinetics; mechanical property; STRENGTHENING MECHANISMS; INTERMETALLIC PHASES; ALUMINUM-ALLOYS; ZONE FORMATION; HEAT-TREATMENT; MICROSTRUCTURE; SOLIDIFICATION; DISSOLUTION; NUCLEATION; ADDITIONS;
D O I：
10.1080/02670836.2021.1972268
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, the effects of 0.14 wt-% Sn on accelerating the precipitation kinetics during heat treatment are quantified. By calculating the activation energy of theta ' phase, it was found that the combined additions of Cu and Sn can reduce the energy barrier and increase the number density of the theta ' phase in the peak aged state, and thus improving yield strength and ultimate tensile strength from 239 and 318 to 445 and 457 MPa, respectively. Based on the quantitative analysis of the theta ' phase, it was found that with the combined additions of Cu and Sn, the average length of the theta ' phase increased from 18.11 to 25.82 nm, and the number density increased from 2.17 x 10(21) to 4.62 x 10(21) m(-3).
引用
收藏
页码：979 / 992
页数：14
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