No Cover Image

Journal article 18 views 1 download

Microstructural Control of Fatigue Behaviour in a Novel  Titanium Alloy / Martin, Bache; Helen, Davies

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

Swansesa University Authors: Martin, Bache, Helen, Davies

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