Print Email Facebook Twitter The Modeling of the Flow Behavior Below and Above the Two-Phase Region for Two Newly Developed Meta-Stable beta Titanium Alloys Title The Modeling of the Flow Behavior Below and Above the Two-Phase Region for Two Newly Developed Meta-Stable beta Titanium Alloys Author Li, Cong (Changsha University of Science and Technology) Ding, Zhili (Changsha University of Science and Technology) van der Zwaag, S. (TU Delft Novel Aerospace Materials; Tsinghua University) Date 2021 Abstract Isothermal hot compression tests of two promising new titanium alloys (Ti-10 V-1Fe-3Al and Ti-10 V-2Cr-3Al) are performed using a TA DIL805D deformation dilatometer at temperatures in and above the two-phase α + β region (730–880 °C) at strain rates ranging from 10−3 to 10−1 s−1. Results show that the flow stress of the two alloys decreases with increasing deformation temperature and decreasing strain rate. Some of the flow curves manifest clear discontinuous yielding and flow softening, both of which are strongly affected by the deformation conditions. The flow stress behavior of these two alloys can be described very well by a hyperbolic–sine Arrhenius equation. When deforming in the α + β phase region, the deformation mechanism is governed by the bending or globularization of the α phase. When deforming in the pure β phase field, the flow behavior is mainly determined by dynamic recovery or recrystallization. The difference in alloy composition has a minor effect on their hot working behavior. Subject constitutive equationshot compressionmicrostructural evolutionstitanium alloyszener holloman parameters To reference this document use: http://resolver.tudelft.nl/uuid:e25450d1-358b-44af-acb3-b6e599d1da80 DOI https://doi.org/10.1002/adem.201901552 Embargo date 2021-03-01 ISSN 1438-1656 Source Advanced Engineering Materials, 23 (1) Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2021 Cong Li, Zhili Ding, S. van der Zwaag Files PDF adem.201901552.pdf 6.93 MB Close viewer /islandora/object/uuid:e25450d1-358b-44af-acb3-b6e599d1da80/datastream/OBJ/view