{332} < 113 > Twinning transfer behavior and its effect on the twin shape in a beta-type Ti-23.1Nb-2.0Zr-1.0O alloy

Abstract

The interaction between twins and grain boundaries (GB) has an important influence on the deformation and fracture behavior of materials. In the present work, {332} < 113 > twinning transfer (TT) behavior and its effect on the twin shape in a deformed β-type Ti-23.1Nb-2.0Zr-1.0O Ti alloy were investigated experimentally and with molecular dynamics simulation. The crystallographic alignment factor of the two twinning systems in the neighboring grains and the misorientation angle of the grain pairs were found to influence the occurrence of TT. This further determines the twin shape: twins present a ruler shape when TT occurs but are in a lenticular shape otherwise. Such different twin shapes are attributed to the local stress states related to TT occurring or not. Both ruler-shaped paired twinning and lenticular twinning would provide effective mechanisms to release or reduce the stress concentration in front of the twin tips in different grain pairs.

Document Type

Journal Article

Date of Publication

2021

Volume

91

Publication Title

Journal of Materials Science & Technology

Publisher

Elsevier

School

School of Engineering

RAS ID

35909

Funders

University of Shanghai for Science and Technology Chinese Academy of Sciences

Comments

Yang, Y., Zhang, B., Meng, Z., Qu, L., Wang, H., Cao, S., ... Huang, A. (2021). {332} < 113 > Twinning transfer behavior and its effect on the twin shape in a beta-type Ti-23.1 Nb-2.0 Zr-1.0 O alloy. Journal of Materials Science & Technology, 91, 58-66. https://doi.org/10.1016/j.jmst.2021.03.015

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First Page

58

Last Page

66

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Link to publisher version (DOI)

10.1016/j.jmst.2021.03.015