Grain refinement of high-purity FCC metals using equal-channel angular pressing

被引：22

作者：

Horita, Zenji ^{[1
]}

Kishikawa, Kaoru ^{[1
]}

Kimura, Keiichi ^{[2
]}

Tatsumi, Kohei ^{[2
]}

Langdon, Terence G. ^{[3
,4
]}

机构：

[1] Kyushu Univ, Fac Engn, Dept Mat Sci & Engn, Fukuoka 8120395, Japan

[2] Nippon Steel Corp Ltd, Techn Dev Bureau, Adv Technol Res Lab, Chiba 2938511, Japan

[3] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA

[4] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA

来源：

RECRYSTALLIZATION AND GRAIN GROWTH III, PTS 1 AND 2 | 2007年 / 558-559卷

基金：

美国国家科学基金会;

关键词：

FCC metals; stacking fault energy; equal channel angular pressing (ECAP); severe plastic deformation (SPD); ultrafine grain sizes; hardness; EBSD;

D O I：

10.4028/www.scientific.net/MSF.558-559.1273

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Equal-channel angular pressing (ECAP) is a valuable technique for refining grain sizes to the submicrometer or the nanometer range. This study explores the reason for the difference in the grain refining behavior between pure Al and pure Cu. First, very high purity levels were adopted in order to minimize any effects of impurities: 99.999% for Al and 99.99999% for Cu. Second, high purity (99.999%) Au was also used in order to examine the effect of stacking fault energy. All three pure metals were subjected to ECAP and microstructural observations and hardness measurements were undertaken with respect to the number of ECAP passes. It is concluded that the stacking fault energy plays an important role and accounts for the difference in the grain refining behavior in the ECAP process.

引用

页码：1273 / +

页数：2

共 7 条

[1]

Hirth J. P., 1968, Theory of Dislocations

[2] Equal-channel angular pressing of commercial aluminum alloys: Grain refinement, thermal stability and tensile properties [J].