Influence of trace Ti on the microstructure, age hardening behavior and mechanical properties of an Al-Zn-Mg-Cu-Zr alloy

被引：59
作者：
Gao, Tong [1 ]
Zhang, Yongrui [1 ]
Liu, Xiangfa [1 ]
机构：
[1] Shandong Univ, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2014年 / 598卷
基金：
中国国家自然科学基金;
关键词：
Cast; Microstructure; Al-Zn-Mg-Cu alloy; Ti; Age hardening; PRECIPITATION EVOLUTION; ALUMINUM-ALLOYS; GRAIN-SIZE; ADDITIONS; SC; STRENGTH;
D O I：
10.1016/j.msea.2014.01.062
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The influence of trace Ti on the microstructure and precipitation process of a Zr-containing Al-Zn-Mg-Cu alloy was investigated. The introduction of Ti results in not only the refinement of alpha-Al grains, but also an early-stage age hardening behavior during aging treatment process. High-resolution transmission electron microscopy results indicate that Ti can decrease the coarsening tendency of L1(2) precipitates and accelerate the growth rate of GP II as well as its evolution to eta' phase. The mechanism was discussed. Accordingly, the tensile strength, elongation and wear property were obviously improved. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：293 / 298
页数：6
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