Effects of temperature and strain rate on elongation at elevated temperature in Al-4.5Mg alloy

被引：5

作者：

Iwasaki, H ^{[1
]}

Kariya, R

Mabuchi, M

Tagata, T

Higashi, K

机构：

[1] Himeji Inst Technol, Coll Engn, Dept Mat Sci & Engn, Himeji, Hyogo 6712201, Japan

[2] Natl Inst Adv Ind Sci & Technol, Nagoya, Aichi 4628510, Japan

[3] SKY Aluminum Co Ltd, Fukuya 3360801, Japan

[4] Univ Osaka Prefecture, Coll Engn, Dept Met & Mat Sci, Sakai, Osaka 5998531, Japan

来源：

MATERIALS TRANSACTIONS | 2001年 / 42卷 / 08期

关键词：

aluminum-magnesium alloy; coarse grain; large elongation; strain rate; cavitation; plastic stability; grain boundary sliding;

D O I：

10.2320/matertrans.42.1771

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of temperature and strain rate on elongation of Al-4.5Mg alloy were investigated at 10(-4)-10(-2) s(-1) and at 573-773 K. The elongation depended on the temperature and strain rate even in the solute-drag creep region; as a result, a large elongation of 352% was attained at 653 K and at 10(-3) s(-1). Necking developed due to a decrease in plastic stability arising from apparent,train softening behavior at 10(-2) s(-1) at 653 K or the low strain rate sensitivity at 10(-3) s(-1) at 573 K. Also, significant cavitation was caused due to grain boundary sliding at 10(-4) s(-1) at 653 K and at 10(-3) s-1 at 773 K. The development of necking and cavitation is responsible for the temperature and strain rate dependence of elongation.

引用

页码：1771 / 1776

页数：6

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