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

页码：71 / 76

页数：6

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