Deformation-induced ω-phase transformation in a β-type titanium alloy during tensile deformation

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• 作者：Huihong Liu^a ; ^{liuhh@jwri.osaka-u.ac.jp} ; Mitsuo Niinomi^b ; ^c ; ^d ; ^e ; Masaaki Nakai^f ; Ken Cho^c ; Hidetoshi Fujii^a
• 关键词：Phase transformations ; Titanium alloys ; Transmission electron microscopy ; Tensile deformation
• 刊名：Scripta Materialia
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：130
• 期：Complete
• 页码：27-31
• 全文大小：2353 K
• 卷排序：130

文摘

Deformation-induced ω-phase transformation during tensile deformation was investigated in the developed spinal-support alloy, Ti-9Cr-0.2O. Both preferential single-variant ω transformation along its [0001] direction and growth and/or assembling of uniformly distributed ω particles undergo in the alloy during tensile deformation. It is confirmed that this deformation-induced ω-phase transformation can be triggered by elastic strain or stress without plastic deformation. Furthermore, a re-orientation process works for this transformation; that is, the ω1 variant may re-orientate into the ω2 variant via {001} ⟨110〉 twinning-type mechanism probably related to the external loading condition and the orientations of ω and β phases.