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Abstract In this study, a Ti–3Mo–3Cr–2Fe–2Al alloy (α + β Ti alloy) showing twinning- and transformation-induced plasticity was investigated. The existence of α yielded fine-grained β phases. The β grains, comprising low-angle… Click to show full abstract
Abstract In this study, a Ti–3Mo–3Cr–2Fe–2Al alloy (α + β Ti alloy) showing twinning- and transformation-induced plasticity was investigated. The existence of α yielded fine-grained β phases. The β grains, comprising low-angle boundaries, produced a high yield strength of 737 MPa despite the low α volume percentage. Martensite and twin interactions with these boundaries induced local stress concentrations. These led to a high work-hardening rate compared to that in a full β microstructure. The α + β Ti alloy showed an excellent combination of strength (1324 MPa) and ductility (0.37).
Journal Title: Journal of Alloys and Compounds
Year Published: 2020
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