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Effect of cooling rate on transformation texture and variant selection during beta -> alpha transformation in Ti-5Ta-1.8Nb alloy

DSpace at IIT Bombay

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Title Effect of cooling rate on transformation texture and variant selection during beta -> alpha transformation in Ti-5Ta-1.8Nb alloy
 
Creator KARTHIKEYAN, T
DASGUPTA, A
KHATIRKAR, R
SAROJA, S
SAMAJDAR, I
VIJAYALAKSHMI, M
 
Subject commercially pure titanium
phase-transformation
ti-6al-4v
sheet
components
evolution
model
titanium
texture
ebsd
x-ray diffraction
variant selection
 
Description The evolution of texture in a cold rolled Ti-5Ta-1.8Nb alloy sheet, during the alpha -> beta -> alpha transformation has been studied using EBSD and XRD techniques, for different cooling rates. The sheet exhibited a basal plane type texture upon cold rolling, and a sharp '{1 1 -2 0}parallel to rolling plane' transformation texture was inherited after the heat treatment. The microtexture analysis of the lamellar alpha/beta structure, suggested that this transformation texture arises from the {1 1 1}< 1 1 0 > type of high temperature beta texture, obeying the Burgers orientation relationship. The strength of the transformation texture was found to sharply increase with decrease in cooling rates, denoting variant selection. Two types of parent beta orientations with [1 1 0] parallel to either rolling directions are possible, and among their alpha product variants, 3 of them are common, and can be preferentially formed at the prior-beta grain boundaries. The role of grain boundary-alpha in influencing variant selection and the transformation texture for different cooling rates is described in this paper. .
 
Publisher ELSEVIER SCIENCE SA
 
Date 2011-07-27T19:48:55Z
2011-12-26T12:58:10Z
2011-12-27T05:47:40Z
2011-07-27T19:48:55Z
2011-12-26T12:58:10Z
2011-12-27T05:47:40Z
2010
 
Type Article
 
Identifier MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 528(2), 549-558
0921-5093
http://dx.doi.org/10.1016/j.msea.2010.09.055
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7312
http://hdl.handle.net/10054/7312
 
Language en