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Recrystallization behavior of a cold rolled Ti–15V–3Sn–3Cr–3Al alloy

Published online by Cambridge University Press:  18 July 2019

Aman Gupta
Affiliation:
Department of Metallurgical and Materials Engineering, Visvesvaraya National Institute of Technology (VNIT), Nagpur, Maharashtra 440010, India
Rajesh Kisni Khatirkar*
Affiliation:
Department of Metallurgical and Materials Engineering, Visvesvaraya National Institute of Technology (VNIT), Nagpur, Maharashtra 440010, India
Tushar Dandekar
Affiliation:
Department of Metallurgical and Materials Engineering, Visvesvaraya National Institute of Technology (VNIT), Nagpur, Maharashtra 440010, India
Jyoti Shankar Jha
Affiliation:
Department of Mechanical Engineering, Indian Institute of Technology Bombay (IITB), Mumbai, Maharashtra 400076, India
Sushil Mishra
Affiliation:
Department of Mechanical Engineering, Indian Institute of Technology Bombay (IITB), Mumbai, Maharashtra 400076, India
*
a)Address all correspondence to this author. e-mail: [email protected], [email protected]
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Abstract

In the present work, a β-Ti alloy (Ti–15V–3Sn–3Cr–3Al) was unidirectionally cold rolled to 80% thickness reduction, followed by recrystallization at two temperatures: (i) 1013 K and (ii) 1053 K. The microstructural developments were studied using light optical microscopy, scanning electron microscopy X-ray peak profile analysis, and electron backscattered diffraction. The bulk texture of deformed and fully recrystallized samples was studied using X-ray diffraction. The deformed microstructures showed the presence of high fraction of shear bands, and these bands were preferentially formed in γ-fiber grains than in the grains with other orientations. Cold rolled β-Ti alloy samples were fully recrystallized in 10 min at 1053 K and in 90 min at 1013 K. Strong α- and γ-fibers were formed after 80% cold rolling, while strong discontinuous γ-fiber (with very strong {111}〈112〉 component) was formed after complete recrystallization. Oriented nucleation was found to be the dominant mechanism for the development of recrystallization texture.

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Article
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Copyright © Materials Research Society 2019 

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