Strain-controlled fatigue in B-modified Ti-6Al-4V alloys

Singh, Gaurav and Gaddam, Raghuveer and Petley, Vijay and Datta, Ranjan and Pederson, Robert and Ramamurty, Upadrasta (2013) Strain-controlled fatigue in B-modified Ti-6Al-4V alloys. In: SCRIPTA MATERIALIA, 69 (9). pp. 698-701.

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Abstract

The strain-controlled fatigue behaviour of Ti-6Al-4V alloy with up to 0.11 wt.% B addition was investigated. Results show significant softening when the strain amplitudes, Delta epsilon(T)/2, are >= 0.75%. B addition was found to improve the fatigue life for Delta epsilon(T)/2 <= 0.75% as it corresponds to the elastic regime and hence is strength dominated. At Delta epsilon(T)/2 = 1%, in contrast, the base alloy exhibits higher fatigue life as TiB particle cracking due to strain incompatibility causes easy crack nucleation in the B-modified alloys. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	SCRIPTA MATERIALIA
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	copyright for this article belongs to Elesvier
Keywords:	Titanium alloys; Low-cycle fatigue; High-cycle fatigue; Plastic deformation; Boron addition
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	01 Nov 2013 09:46
Last Modified:	01 Nov 2013 09:46
URI:	http://eprints.iisc.ac.in/id/eprint/47631

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