Precipitation evolution in Al-Er-Zr alloys during aging at elevated temperature

被引：114
作者：
Wen, S. P. [1 ]
Gao, K. Y. [1 ]
Huang, H. [1 ]
Wang, W. [1 ]
Nie, Z. R. [1 ]
机构：
[1] Beijing Univ Technol, Sch Mat Sci & Engn, Beijing 100124, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 574卷
关键词：
Aluminum alloy; Precipitation; Erbium; Zirconium; MECHANICAL-PROPERTIES; DEGREES-C; ALUMINUM; COHERENCY; AMBIENT;
D O I：
10.1016/j.jallcom.2013.03.237
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：
The temporal evolution of the Al-3(ErZr) precipitates is investigated in Al-0.04Er-0.04Zr and Al-0.04 Er-0.08Zr alloys during aging at elevated temperature of 450 and 500 degrees C. The results show that the coarsening behavior of the precipitates in both alloys is similar, due to the core-shell structure with Zr segregated in the shell of the Al-3(ErZr) precipitates. With the increase of the amount of Zr addition, the misfit between the precipitate and the Al matrix decreases, consequently the coherency transition size of the precipitates in Al-0.04Er-0.08Zr is larger than that of Al-0.04Er-0.04Zr. After aging at 500 degrees C for 100 h, some of the precipitates in Al-0.04Er-0.08Zr transform to D0(23) structure due to the high Zr/Er ratio, while the precipitates in Al-0.04Er-0.04Zr keep the L1(2) structure. (C) 2013 Published by Elsevier B.V.
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收藏
页码：92 / 97
页数：6
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