Low temperature flow behavior of B2 intermetallic phase in Ti-Al-Nb system

被引：9
作者：
Shankar, Hari
Prasad, N. Eswara
Singh, A. K.
Nandy, T. K. [1 ]
机构：
[1] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India
[2] Indian Inst Technol, Kanpur 208016, Uttar Pradesh, India
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 424卷 / 1-2期
关键词：
intermetallic; Ti-Al-Nb system; Peierl;
D O I：
10.1016/j.msea.2006.02.048
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Low temperature flow behavior of polycrystalline B2 intermetallic in Ti-Al-Nb system has been studied in a range of temperature (77-298 K) and strain rate (10(-4) to 10(-3) s(-1)). To assess the rate limiting mechanisms, activation volume and energy have been determined. Relatively low values of activation volume (20-50b(3)) and activation energy (0.2 mu b(3)) suggest that a short-range obstacle that is Peierls barrier restricts the dislocation movement. Work hardening behavior of the intermetallic is also studied and contrasted with that of other B2 intermetallics. The intermetallic C exhibits extremely low rates of work hardening that is attributed to localized and planar flow. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：71 / 76
页数：6
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