Microstructure and Mechanical Properties of α’ Martensite Type Ti-V-Al Alloy after Cold- or Hot Working Process

Hiroaki Matsumoto; Hiroshi Yoneda; Kazuhisa Sato; Toyohiko J. Konno; Shingo Kurosu; Damien Fabrègue; Éric Maire; Akihiko Chiba

doi:10.4028/www.scientific.net/KEM.436.171

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 436Microstructure and Mechanical Properties of α’...

Microstructure and Mechanical Properties of α’ Martensite Type Ti-V-Al Alloy after Cold- or Hot Working Process

Abstract:

Ti alloys are widely utilized for industrial applications due to their excellent mechanical properties combined with low density. In general, Ti alloys are classified as , + and  alloys, with further subdivision into near  and metastable  alloys. Quite recently, we have presented new type structural ’ martensite (H.C.P.) Ti alloys with low Young’s modulus, high strength and excellent ductility at room temperature. In this work, we examined the microstructure and mechanical properties of ’ martensite type Ti-V-Al alloy after cold- or hot working process. Then, we found that deformation behavior of ’ initial microstructure as compared with (+) initial microstructure was different based on the results of stress-strain curves and Processing Maps under the hot working process. Further, cold rolled ’ martensite microstructure exhibited the refined equiaxed dislocation cell structure, thereby resulting in high strength. This result suggests the new type deformation processing (for both cold- and hot work processing) utilizing ’ martensite in industrial Ti alloys.

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Periodical:

Key Engineering Materials (Volume 436)

Pages:

171-177

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.436.171

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Online since:

May 2010

Authors:

Hiroaki Matsumoto, Hiroshi Yoneda, Kazuhisa Sato, Toyohiko J. Konno, Shingo Kurosu, Damien Fabrègue, Éric Maire, Akihiko Chiba

Keywords:

Arufa Prime Martensite, Cold Working, Hot Working, Ti-V-Al Alloy

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