Rolling Texture of α"-Phase in Ti-22mol%Nb-3mol%Al Biomedical Shape Memory Alloy

Tomonari Inamura; Ryutaro Shimizu; Jae II Kim; Hee Young Kim; Kenji Wakashima; Shuichi Miyazaki; Hideki Hosoda

doi:10.4028/www.scientific.net/MSF.561-565.1517

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HomeMaterials Science ForumMaterials Science Forum Vols. 561-565Rolling Texture of α"-Phase in Ti-22mol%Nb-3mol%Al...

Rolling Texture of α"-Phase in Ti-22mol%Nb-3mol%Al Biomedical Shape Memory Alloy

Abstract:

Rolling texture of α"(C-orthorhombic) martensite phase in Ti-22mol%Nb-3mol%Al β-titanium based shape memory alloy was examined using X-ray pole figure measurement. The alloy was dual phase of α'' and β(bcc) at room temperature (RT) and was cold-rolled with reduction rates of 40%~99% at RT. Stress-induced martensitic transformation occurred during the rolling and then the material was fully transformed into martensite phase. Subscript α" and β indicate martensite and parent phase hereafter. The major texture was close to {411}α"<173>α" when the reduction rate was lower than 60%. This texture is a result of a preferential formation of specific variants which have a higher interaction with the macroscopic deformation. As the reduction rate was increased, ND moved toward {101}α" whereas RD was around <010>α" regardless of the reduction rate. {101}α"<010>α" texture was confirmed when the reduction rate was 99%.

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Materials Science Forum (Volumes 561-565)

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1517-1520

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.1517

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October 2007

Authors:

Tomonari Inamura, Ryutaro Shimizu, Jae II Kim, Hee Young Kim, Kenji Wakashima, Shuichi Miyazaki, Hideki Hosoda

Keywords:

Biomaterial, Martensite, Shape Memory Alloy Actuator, Texture, Titanium (Ti)

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