Microstructure-texture-mechanical properties relationship in multi-pass warm rolled Ti-6Al-4V Alloy

Murty, S V S Narayana and Nayan, Niraj and Kumar, Pankaj and Narayanan, P Ramesh and Sharma, S C and George, Koshy M (2014) Microstructure-texture-mechanical properties relationship in multi-pass warm rolled Ti-6Al-4V Alloy. In: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 589 . pp. 174-181.

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Abstract

In the present study, high strength bulk ultrafine-grained titanium alloy Ti-6Al-4V bars were successfully processed using multi-pass warm rolling. Ti-6Al-4V bars of 12 mm diameter and several metres long were processed by multi-pass warm rolling at 650 degrees C, 700 degrees C and 750 degrees C. The highest achieved mechanical properties for Ti-6Al-4V in as rolled condition were yield strength 1191 MPa, ultimate tensile strength of 1299 MPa having an elongation of 10% when the rolling temperature was 650 degrees C. The concurrent evolution of microstructure and texture has been studied using optical microscopy, electron back scattered diffraction and x-ray diffraction. The significant improvement in mechanical properties has been attributed to the ultrafine-grained microstructure as well as the morphology of alpha and beta phases in the warm rolled specimens. The warm rolling of Ti-6Al-4V leads to formation of < 10 (1) over bar0 >alpha//RD fibre texture. This study shows that multi-pass warm rolling has potential to eliminate the costly and time consuming heat treatment steps for small diameter bar products, as the solution treated and aged (STA) properties are achievable in the as rolled condition itself. (C) 2013 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Publisher:	ELSEVIER SCIENCE SA
Additional Information:	copyright for this article belongs to ELSEVIER SCIENCE SA,SWITZERLAND
Keywords:	Microstructure; Texture; Mechanical properties; Titanium alloy Ti-6Al-4V; Warm rolling
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	20 Jan 2014 08:25
Last Modified:	20 Jan 2014 08:25
URI:	http://eprints.iisc.ac.in/id/eprint/48199

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