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

Author(s)
Zhang, Jinyong; Sun, Fan; Chen, Zheng; Yang, Yang; Shen, Baolong; ... Show more
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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. © 2019
Date issued
2019-03
URI
https://hdl.handle.net/1721.1/124438
Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering; Massachusetts Institute of Technology. Department of Materials Science and Engineering
Journal
Materials research letters
Publisher
Informa UK Limited
Citation
Zhang, Jinyong, et al., "Strong and ductile beta Ti-18Zr-13Mo alloy with multimodal twinning." Materials research letters 7, 6 (March 2019): p. 251-7 doi 10.1080/21663831.2019.1595763 ©2019 Author(s)
Version: Final published version
ISSN
2166-3831
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