MATEC Web Conf.
Volume 321, 2020The 14th World Conference on Titanium (Ti 2019)
|Number of page(s)||6|
|Published online||12 October 2020|
H effect on the plasticity of Ti575 alloy
1 School of Materials, University of Manchester, Manchester, M13 9PL, UK
Adsorption of hydrogen (H) can result in severe performance degradation of Ti alloys. In this study, the effect of H on the plasticity of Ti-5Al-7 5V-0.5Si (Ti575) alloy is investigated. High resolution digital image correlation (HRDIC) is employed to elucidate the effect of H on the strain distribution and dislocation slip character of the alloy during mechanical loading. It is found that H enhances slip heterogeneity and promotes the formation of long and sparse prismatic slip bands in the α phase, which can extend to across several grains. Such heterogenous prismatic slip bands are likely to originate from the lenticular hydrides, which have the prismatic plane as their habit plane. In addition, H also shows considerable effect on the plasticity of β phase, which facilitates the slip transmission and enhances the slip localisation.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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