Influence of pressing speed on microstructural development in equal-channel angular pressing

被引:180
作者
Berbon, PB
Furukawa, M
Horita, Z
Nemoto, M
Langdon, TG
机构
[1] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA
[2] Univ So Calif, Dept Mech Engn, Los Angeles, CA 90089 USA
[3] Fukuoka Univ Educ, Dept Technol, Fukuoka 8114192, Japan
[4] Kyushu Univ, Dept Mat Sci & Engn, Fac Engn, Fukuoka 8128581, Japan
来源
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1999年 / 30卷 / 08期
基金
美国国家科学基金会; 日本学术振兴会;
关键词
D O I
10.1007/s11661-999-0009-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The influence of pressing speed in equal-channel angular (ECA) pressing was investigated using samples of pure Al and an Al-1 pet Mg alloy and a range of pressing speeds from similar to 10(-2) to similar to 10 mm s(-1). The results show that the speed of pressing has no significant influence on the equilibrium grain size, at least over the range used in these experiments. Thus, the equilibrium grain sizes were similar to 1.2 mu m for pure Al and similar to 0.5 mu m for the Al-1 pet Mg alloy for all pressing conditions. However, it is shown that the nature of the microstructure is dependent on the pressing speed, because recovery occurs more easily at the slower speeds, so that the microstructure is then more equilibrated. There is also indirect evidence for the advent of frictional effects when the cross-sectional dimensions of the samples are at or below -5 mm.
引用
收藏
页码:1989 / 1997
页数:9
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