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Microstructure evolution of martensitic Ti-6Al-4V alloy during warm deformation

Chao, Qi, Hodgson, Peter D and Beladi, Hossein 2014, Microstructure evolution of martensitic Ti-6Al-4V alloy during warm deformation, Materials Science Forum, vol. 783-786, pp. 679-684.

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Title Microstructure evolution of martensitic Ti-6Al-4V alloy during warm deformation
Author(s) Chao, Qi
Hodgson, Peter D
Beladi, Hossein
Journal name Materials Science Forum
Volume number 783-786
Start page 679
End page 684
Total pages 6
Publisher Trans Tech Publications
Place of publication Stafa-Zurich, Switzerland
Publication date 2014
ISSN 0255-5476
Keyword(s) Continuous dynamic recrystallization
Grain refinement
Martensite
Thermomechanical processing
Titanium alloys
Summary The microstructure evolution of martensitic Ti-6Al-4V alloy was investigated through uniaxial hot compression at 700°C and a strain rate of 10-3 s-1. A combination of scanning electron microscopy observation in conjunction with high resolution electron back scattered diffraction (EBSD) was used to characterize the microstructure in detail. The development of the microstructure displayed continuous fragmentation of martensitic laths with increasing strain (i.e. continuous dynamic recrystallization), concurrently with decomposition of supersaturated martensite resulting in the formation of equiaxed grains. At a strain of 0.8, an ultrafine equiaxed grained structure with mostly high angle grain boundaries was successfully obtained. The current work proposes a novel approach to produce equiaxed ultrafine grains in a Ti-6Al-4V alloy through thermomechanical processing of a martensitic starting microstructure. © (2014) Trans Tech Publications, Switzerland.
Language eng
Field of Research 091299 Materials Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Trans Tech Publications
Persistent URL http://hdl.handle.net/10536/DRO/DU:30070100

Document type: Journal Article
Collection: Institute for Frontier Materials
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