Temperature dependence of deformation behavior in magnesium and magnesium alloy single crystals

被引：23

作者：

Ando, Shinji ^{[1
]}

Harada, Naoharu ^{[2
]}

Tsushida, Masayuki ^{[3
]}

Kitahara, Hiromoto ^{[1
]}

Tonda, Hideki ^{[1
]}

机构：

[1] Kumamoto Univ, Dept Mat Sci & Engn, Kumamoto, Japan

[2] Kumamoto Univ, Grad Sch Sci & Technol, Kumamoto, Japan

[3] Kumamoto Univ, Fac Engn, Kumamoto, Japan

来源：

MECHANICAL BEHAVIOR OF MATERIALS X, PTS 1AND 2 | 2007年 / 345-346卷

关键词：

magnesium; single crystal; dislocation; pyramidal slip; yield stress; slip bands;

D O I：

10.4028/www.scientific.net/KEM.345-346.101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It is important to research activation of the slip systems in magnesium crystals to understand deformation behavior of magnesium. In this study, pure magnesium, Mg-7.0at%Li and Mg-0.1at%Zn single crystals were stretched in the [11-20] direction in the range of 77K to 573K to investigate the deformation behavior by non-basal slip. The active slip system was investigated by the observation of slip bands, etch pit bands and dislocations by TEM. {11-22} <-1-123 > second order pyramidal slip is activated in all magnesium and magnesium alloy single crystals, and its yield stress shows anomalous temperature dependence in the range from 77K to 293K, however, the yields stress decreased rapidly with increasing temperature above 293K. The yield stress due to the pyramidal slip in Mg-Li and Mg-Zn alloy were lower than that of pure magnesium about 20MPa whereas the stress of Mg-Zn at 77K was about two times higher than pure magnesium.

引用

页码：101 / +

页数：2

共 5 条

[1]

AHMADIEH A, 1965, T METALL SOC AIME, V233, P1130

[2] Pyramidal slip in magnesium alloy single crystals [J].

Ando, S ;

Tanaka, M ;

Tonda, H .

MAGNESIUM ALLOYS 2003, PTS 1 AND 2, 2003, 419-4 :87-92

[3] Non-basal slip in magnesium-lithium alloy single crystals [J].

Ando, S ;

Tonda, H .

MATERIALS TRANSACTIONS JIM, 2000, 41 (09) :1188-1191

[4]

ANDO S., 1992, JAPAN I LIGHT METALS, V42, P765

[5]

VONMISES R, 1928, ANGEW MATH MECH, V8, P161

← 1 →