Temperature Dependence of Activation Enthalpy for Yielding in Bimodal Ti-6Al-4V

被引：14

作者：

Anne, Bhargavi Rani ^{[1
,3
]}

Tanaka, Masaki ^{[2
]}

Morikawa, Tatsuya ^{[2
]}

机构：

[1] Kyushu Univ, Grad Sch Engn, Dept Mat Sci & Engn, Fukuoka, Fukuoka 8190395, Japan

[2] Kyushu Univ, Fac Engn, Dept Mat Sci & Engn, Fukuoka, Fukuoka 8190395, Japan

[3] Kyushu Univ, Fukuoka, Fukuoka, Japan

来源：

MATERIALS TRANSACTIONS | 2019年 / 60卷 / 09期

关键词：

dislocation glide; activation energy; effective stress; titanium alloy; HIGH-STRAIN-RATE; MECHANICAL-PROPERTIES; TITANIUM-ALLOY; 1/3(1123)(1011) DISLOCATIONS; DEFORMATION MECHANISMS; PLASTIC-DEFORMATION; ALPHA-TITANIUM; CORE STRUCTURE; HCP CRYSTALS; HOT-WORKING;

D O I：

10.2320/matertrans.ME201902

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mechanical properties relating to the thermally activated process of yielding was investigated in Ti-6Al-4V with a bimodal microstructure, consisting of both primary alpha grains and lamellar colonies of secondary alpha/beta lamellae. The temperature dependence of yield stress, effective stress, activation volume, and activation enthalpy were investigated between 77K and 650 K. The yield stress and effective stress decreased with increasing temperature. It was found that the temperature dependence of activation enthalpy for yielding shows values between those obtained from basal slips and prismatic slips investigated in single crystalline alpha-titanium. This suggests that the thermally activated processes which control the yielding of bimodal Ti-6Al-4V is the combination of basal and prismatic slips.

引用

页码：1828 / 1832

页数：5

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