Investigation of early stage deformation mechanisms in a metastable β titanium alloy showing combined twinning-induced plasticity and transformation-induced plasticity effects
(2013) Acta Materialia — Vol. 61, n° 17, p. 6406-6417 (2013)
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- Authors
Marteleur, Matthieu 
- Abstract
- As expected from the alloy design procedure, combined twinning-induced plasticity and transformation-induced plasticity effects are activated in a metastable β Ti–12 wt.% Mo alloy. In situ synchrotron X-ray diffraction, electron backscatter diffraction and transmission electron microscopy observations were carried out to investigate the deformation mechanisms and microstructure evolution sequence. In the early deformation stage, primary strain/stress-induced phase transformations (β → ω and β → α″) and primary mechanical twinning ({3 3 2}〈1 1 3〉 and {1 1 2}〈1 1 1〉) are activated simultaneously. Secondary martensitic phase transformation and secondary mechanical twinning are then triggered in the twinned β zones. The {3 3 2}〈1 1 3〉 twinning and the subsequent secondary mechanisms dominate the early-stage deformation process. The evolution of the deformation microstructure results in a high strain-hardening rate (∼2 GPa), bringing about high tensile strength (∼1 GPa) and large uniform elongation (>0.38).
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Citations
Sun, F., Zhang, J. Y., Marteleur, M., Gloriant, T., Vermaut, P., Laillé, D., Castany, P., Curfs, C., Jacques, P., & Prima, F. (2013). Investigation of early stage deformation mechanisms in a metastable β titanium alloy showing combined twinning-induced plasticity and transformation-induced plasticity effects. Acta Materialia, 61(17), 6406-6417. https://doi.org/10.1016/j.actamat.2013.07.019 (Original work published 2013)