Cyclic deformation behaviour of commercially pure titanium at cryogenic temperature

被引：18
|
作者：
Sun, QY [1 ]
Song, XP [1 ]
Gu, HC [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2001年 / 23卷 / 03期
关键词：
titanium; low-temperature fatigue; cyclic hardening;
D O I：
10.1016/S0142-1123(00)00089-X
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Push-pull law-cycle fatigue tests were carried out on annealed and hot-rolled commercially pure titanium under total strain control at 77 K. Very obvious cyclic-hardening behaviour was observed at the beginning of fatigue for the strain amplitudes employed. A large number of twins with various appearances was observed in the microstructure of fatigued specimens of annealed and hot-rolled titanium. Three twinning systems, (11 (2) over bar(1) over bar), (1 (1) over bar 02) and (1 (2) over bar 12) types, are operative in the cyclic deformation of titanium. Twinning is considered to be the main deformation mode of pure titanium fatigued at 77 K and to be the main reason for the cyclic hardening of pure titanium at low temperature. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：187 / 191
页数：5
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