Effects of homogenization on precipitation of Al3(Er,Zr) particles and recrystallization behavior in a new type Al-Zn-Mg-Er-Zr alloy

被引：82
作者：
Wu, H. [1 ]
Wen, S. P. [1 ]
Huang, H. [1 ]
Li, B. L. [1 ]
Wu, X. L. [1 ]
Gao, K. Y. [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：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 689卷
基金：
北京市自然科学基金; 中国国家自然科学基金;
关键词：
Al-Zn-Mg-Er-Zr alloy; Homogenization; Al-3(Er; Zr); particles; Precipitation behavior; Recrystallization resistance; HOT DEFORMATION-BEHAVIOR; MECHANICAL-PROPERTIES; ALUMINUM-ALLOYS; MICROALLOYING ADDITIONS; HEAT-TREATMENT; DEGREES-C; MICROSTRUCTURE; SC; SCANDIUM; ZIRCONIUM;
D O I：
10.1016/j.msea.2017.02.071
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effects of homogenization treatments on the precipitation behavior of Al-3(Er,Zr) particles and theirs effects on recrystallization resistance in a new type Al-Zn-Mg-Er-Zr alloy have been investigated. Four different homogenization treatments, conventional one-stage homogenization, double-stage homogenization and ramp heating homogenization are carried out. Compared with that in the conventional one-stage homogenization, a finer particle size, higher number density and volume fraction of Al-3(Er,Zr) particles can be obtained in other three homogenization treatments. In addition, the double-stage homogenization and the ramp heating homogenization can improve the Al-3(Er,Zr) particles distribution and minimize the width of precipitation free zone in the region near the grain boundary, and provide an additional but nonnegligible strengthening effect for the Al-Zn-Mg-Er-Zr alloy. The difference in precipitation behavior of Al-3(Er,Zr) particles lead to different recrystallization resistance. The high recrystallization resistance can be attributed to the larger fv/r ratio of Al-3(Er,Zr) particles, which resulting in a higher Zener drag to effectively resist the recrystallization in Al-Zn-MgEr-Zr alloy during hot deformation and the subsequent thermal processing. Therefore, under the same annealing time, the double-stage homogenized and the ramp heating homogenized samples can achieve a significant lower recrystallized fraction compared with the conventional one-stage homogenized samples.
引用
收藏
页码：313 / 322
页数：10
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