Strong and ductile beta Ti–18Zr–13Mo alloy with multimodal twinning

Jinyong Zhang, Fan Sun, Zheng Chen, Yang Yang, Baolong Shen, Ju Li, Frédéric Prima

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Abstract

Body-centred cubic (BCC) Ti–18Zr–13Mo (wt%) alloy displays excellent yield strength (≈800 MPa), stable hardening (rate > 1500 MPa) and uniform ductility >18%, resulting from multi-TWIP (multiple twinning-induced plasticity) strengthening effect. This multimodal mechanisms include micro-scale {332}<113> deformation twinning (DT), nano-scale {112}<111> DT and a rare {5 8 11}<135> DT mode. Martensitic phase transformation is completely suppressed and the sample stays a single-phase solid solution throughout the deformation. In situ electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) were used to characterize the multi-TWIP and dynamic Hall–Patch effect, with dislocation slip and large grain distortions at twin interfaces.

Original languageEnglish (US)
Pages (from-to)251-257
Number of pages7
JournalMaterials Research Letters
Volume7
Issue number6
DOIs
StatePublished - Jun 3 2019

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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