Effect of Sc and Zr on recrystallization behavior of 7075 aluminum alloy

被引：0
作者：
LENG J.-F. [1 ]
REN B.-H. [1 ]
ZHOU Q.-B. [2 ]
ZHAO J.-W. [1 ]
机构：
[1] School of Materials Science and Engineering, University of Ji'nan, Ji'nan
[2] Shandong Zhonglv Carbon Material Co., Ltd., Ji'nan
来源：
Transactions of Nonferrous Metals Society of China (English Edition) | 2021年 / 31卷 / 09期
基金：
中国国家自然科学基金;
关键词：
7075 aluminum alloy; Al[!sub]3[!/sub](Sc; Zr); phase; mechanical properties; recrystallization;
D O I：
10.1016/S1003-6326(21)65674-1
中图分类号：
学科分类号：
摘要：
The static recrystallization behavior of 7075 aluminum alloy containing Al3(Sc,Zr) phase prepared by casting and the relationship between recrystallization behavior and mechanical properties were studied. The addition of Sc and Zr made the Sc–Zr–7075 aluminum alloy remain the most of fibrous structure and high-density dislocations formed in the extrusion process, resulting in the recrystallization fraction of the alloy decreasing from 35% to 22%, and the corresponding fraction of substructure increasing from 59% to 67%. The Sc and Zr effectively inhibited the recrystallization behavior of 7075 aluminum alloy mainly, which was attributed to the fact that the existence of fine and coherent Al3(Sc,Zr) phase (r = 35 nm, f = 1.8×10−3) strongly pined the dislocations and grain boundaries, preventing the dislocations from rearranging into sub-grain boundaries and from developing into high angle grain boundaries, and further hindering the formation and growth of recrystallized core of the alloy. © 2021 The Nonferrous Metals Society of China
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页码：2545 / 2557
页数：12
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