Ultrafine grain formation in a Ti-6Al-4V alloy by thermomechanical processing of a martensitic microstructure

Chao, Qi, Hodgson, Peter D. and Beladi, Hossein 2014, Ultrafine grain formation in a Ti-6Al-4V alloy by thermomechanical processing of a martensitic microstructure, Metallurgical and materials transactions a: physical metallurgy and materials science, vol. 45, no. 5, pp. 2659-2671, doi: 10.1007/s11661-014-2205-5.

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Title Ultrafine grain formation in a Ti-6Al-4V alloy by thermomechanical processing of a martensitic microstructure
Author(s) Chao, Qi
Hodgson, Peter D.
Beladi, HosseinORCID iD for Beladi, Hossein orcid.org/0000-0003-0131-707X
Journal name Metallurgical and materials transactions a: physical metallurgy and materials science
Volume number 45
Issue number 5
Start page 2659
End page 2671
Publisher Springer
Place of publication New York, N.Y.
Publication date 2014-05
ISSN 1073-5623
1543-1940
Summary In the current study, ultrafine equiaxed grains with a size of 150 to 800 nm were successfully produced in a Ti-6Al-4V alloy through thermomechanical processing of a martensitic starting microstructure. This was achieved through a novel mechanism of grain refinement consisting of several concurrent processes. This involves the development of substructure in the lath interiors at an early stage of deformation, which progressed into small high-angle segments with increasing strain. Consequently, the microstructure was gradually transformed to an equiaxed ultrafine grained structure, mostly surrounded by high-angle grain boundaries, through continuous dynamic recrystallization. Simultaneously, the supersaturated martensite was decomposed during deformation, leading to the progressive formation of beta phase, mainly nucleated on the intervariant lath boundaries.
Language eng
DOI 10.1007/s11661-014-2205-5
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, The Minerals, Metals & Materials Society and ASM International
Persistent URL http://hdl.handle.net/10536/DRO/DU:30070096

Document type: Journal Article
Collections: Institute for Frontier Materials
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