Stress-induced transformations during the compression of a Ti-1033 alloy

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Page: 511-518

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Ahmed, Mansur; Gazder, Azdiar A; Saleh, Ahmed A; Wexler, David; Pereloma, Elena V
induced; transformations; stress; during; ti; compression; alloy; 1033; Engineering; Science and Technology Studies
lecture / presentation description
A near-β Ti-10V-3A1-3Fe (wt.%) alloy containing different a phase fractions after thermo- mechanical processing was compressed to 40% reduction. Detailed microstructure evaluation was carried out using high resolution scanning transmission electron microscopy and electron back-scattering diffraction. For the first time, deformation-induced β → α" and β → ω transformation products together with {332}{113}β and {112}{111}β twinning systems were simultaneously detected in a metastable β alloy containing an α phase. The effects of strain rate and β phase stability on the preferential activation of these reactions were analyzed. With an increase in β phase stability, stress-induced phase transformations were restricted and {112}{111}β twinning was dominant. Aleternatively, less stable β conditions or higher strain rates resulted in the dominance of the {332}{113}β twinning system.