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Dislocations and Charge Density Distributions of γ Phase in Ti47.5Al2.5V Deformed at Room Temperature and 400°C

Published online by Cambridge University Press:  22 February 2011

Jing Zhu ,
Ying Gao  and
Yu Miao
Jing Zhu
Affiliation:
Central Iron &. Steel Research Institute, Beijing 100081, P. R. China
Ying Gao
Affiliation:
Central Iron &. Steel Research Institute, Beijing 100081, P. R. China
Yu Miao
Affiliation:
Central Iron &. Steel Research Institute, Beijing 100081, P. R. China
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Abstract

The observations on quantity and configuration of dislocations by TEM conventional diffraction contrast method as well as the determinations of the electron charge density distributions by the quantitative electron crystallography method in Ti47. 5A12. 5V deformed at 400°C and room temperature (R. T.) have been carried out. The metallic bonding between Al—Al or Ti—Ti atom pair along <C110] and Ti — Ti along <C112] direction is strengthened; while the metallic bonding between Ti — Al atom pair both along <C101] and <12l] direction is weakened at 400°C. The quantities of a/2<110], a/2<112] and dissociated a <101] (a[101] →a/2[110] + a/3[112] + SISF+a/6[112] ) dislocations are increased at 400°C, compared with that at R. T.. The a/ 2 < 121] superdislocations have not been seen both at 400°C and R. T..

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 641
Copyright
Copyright © Materials Research Society 1995

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