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A novel TRIP/TWIP titanium alloy: design strategy and investigation of strength-ductility mechanisms
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DOI：10.1016/j.msea.2026.150914.png)
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Abstract
En 中文
• Two novel Ti–Al–Mo–Cr–Zr metastable β-Ti alloys were designed by integrated d-electron and e/α‾ - Δr‾ theories, targeting distinct TRIP/TWIP deformation mechanisms. • Both Ti-1Al-7Mo-3Cr-1Zr (TRIP/TWIP) and Ti-3Al-5Mo-4Cr-1Zr (TRIP) exhibit excellent strength-ductility combinations, characterized by a stable hardening plateau in the former and a high work-hardening peak in the latter. • Ti-1Al-7Mo-3Cr-1Zr alloy exhibits continuous yielding due to a higher trigger stress that suppresses martensitic transformation. Ti-3Al-5Mo-4Cr-1Zr alloy shows a distinct double-yielding behavior caused by early activation of soft α″ martensite with low trigger stress. • The strength contribution of two Ti-Al-Mo-Cr-Zr alloys is quantitatively elucidated by the composite strengthening model.
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