Study on formation mechanism of {332}<113> deformation twinning in metastable β-type Ti alloy focusing on stress-induced α" martensite phase. (1st March 2020)

• Record Type: Journal Article
• Authors: Cho, Ken; Morioka, Ryota; Harjo, Stefanus; Kawasaki, Takuro; Yasuda, Hiroyuki Y.
• Is Part Of: Scripta materialia. Number 177(2020)
• Page Start: 106
• Page End: 111
• Publication Date: 2020-03-01
• Subjects: Titanium alloys -- Deformation structure -- Twinning -- Stress-induced martensite -- In site neutron diffraction; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.10.011
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Deformation behavior of Ti–12Mo alloy which is primarily deformed by {332}<113> deformation twinning was studied by in situ neutron diffraction measurements and deformation structure analyses, focusing on the formation of stress-induced α" martensite phase. We directly observed for the first time that the α" phase was formed at the initial stage of the plastic deformation and the volume fraction of the phase increased with increasing plastic deformation. This stress-induced α" martensite phase acts as a nucleation site for the {332}<113> twins. Further increase in stress results in a replacement of the α" phase by the {332}<113> twins. Graphical abstract: Image, graphical abstract