The effect of the beta phase on the micromechanical response of dual-phase titanium alloys
Ashton, Patrick J. Jun, Tea-Sung Zhang, Zhen Britton, T. Benjamin Harte, Annette M. Leen, Sean B. Dunne, Fionn P.E.
Ashton, Patrick J.
Jun, Tea-Sung
Zhang, Zhen
Britton, T. Benjamin
Harte, Annette M.
Leen, Sean B.
Dunne, Fionn P.E.
Loading...
Repository DOI
Publication Date
2017-03-24
Type
Article
Downloads
Citation
Ashton, Patrick J., Jun, Tea-Sung, Zhang, Zhen, Britton, T. Benjamin, Harte, Annette M., Leen, Sean B., & Dunne, Fionn P. E. (2017). The effect of the beta phase on the micromechanical response of dual-phase titanium alloys. International Journal of Fatigue, 100, 377-387. doi: https://doi.org/10.1016/j.ijfatigue.2017.03.020
Abstract
This paper investigates the role of beta phase on the micro-mechanical behaviour of dual-phase titanium alloys, with particular emphasis on the phenomenon of cold dwell fatigue, which occurs in such alloys under room temperature conditions. A strain gradient crystal plasticity model is developed and calibrated against micro-pillar compression test data for a dual-phase alpha-beta specimen. The effects of key microstructural variables, such as relative beta lath orientation, on the micromechanical response of idealised alpha-beta colony microstructures are shown to be consistent with previously-published test data. A polycrystal study on the effects of the calibrated alpha-beta crystal plasticity model on the local micromechanical variables controlling cold dwell fatigue is presented. The presence of the alpha-beta phase is predicted to increase dwell fatigue resistance compared to a pure alpha phase microstructure. (C) 2017 Elsevier Ltd. All rights reserved.
Publisher
Elsevier
Publisher DOI
10.1016/j.ijfatigue.2017.03.020
Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland