No Cover Image

Journal article 97 views 19 downloads

Microstructural Control of Fatigue Behaviour in a Novel α + β Titanium Alloy / Martin, Bache; Helen, Davies

Metals, Volume: 9, Issue: 11, Start page: 1200

Swansesa University Authors: Martin, Bache, Helen, Davies

  • bache2019.pdf

    PDF | Version of Record

    This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license

    Download (10.36MB)

Check full text

DOI (Published version): 10.3390/met9111200

Abstract

The novel titanium alloy TIMETAL® 407 (Ti-407) has been developed as an alternative to Ti-6Al-4V (Ti-6-4), for applications that demand relatively high ductility and energy absorption. Demonstrating a combination of lower strength and greater ductility, the alloy introduces a variety of cost reducti...

Full description

Published in: Metals
ISSN: 2075-4701
Published: MDPI AG 2019
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa52766
Tags: Add Tag
No Tags, Be the first to tag this record!
Abstract: The novel titanium alloy TIMETAL® 407 (Ti-407) has been developed as an alternative to Ti-6Al-4V (Ti-6-4), for applications that demand relatively high ductility and energy absorption. Demonstrating a combination of lower strength and greater ductility, the alloy introduces a variety of cost reduction opportunities, including improved machinability. Thermo-mechanical processing and its effects on microstructure and subsequent mechanical performance are characterised, including a detailed assessment of the fatigue and crack propagation properties. Demonstrating relatively strong behaviour under high-cycle fatigue loading, Ti-407 is nevertheless susceptible to time-dependent fatigue effects. Its sensitivity to dwell loading is quantified, and the associated deformation and fracture mechanisms responsible for controlling fatigue life are explored. The intimate relationship between thermo-mechanical processing, micro-texture and fatigue crack initiation through the generation of quasi-cleavage facets is highlighted. Consistent fatigue crack growth kinetics are demonstrated, independent of local microstructure.
Keywords: Ti-407; dwell sensitive fatigue; quasi-cleavage facets; micro-texture; macro-zones;
Issue: 11
Start Page: 1200