High Pressure Phase-Transformation Induced Texture Evolution and Strengthening in Zirconium Metal: Experiment and Modeling.
Document Type
Article
Publication Date
7-28-2015
Publication Title
Scientific Reports
Volume
5
First page number:
12552
Abstract
We studied the phase-transition induced texture changes and strengthening mechanism for zirconium metal under quasi-hydrostatic compression and uni-axial deformation under confined high pressure using the deformation-DIA (D-DIA) apparatus. It is shown that the experimentally obtained texture for ω-phase Zr can be qualitatively described by combining a subset of orientation variants previously proposed in two different models. The determined flow stress for the high-pressure ω-phase is 0.5–1.2 GPa, more than three times higher than that of the α-phase. Using first-principles calculations, we investigated the mechanical and electronic properties of the two Zr polymorphs. We find that the observed strengthening can be attributed to the relatively strong directional bonding in the ω phase, which significantly increases its shear plastic resistance over the α-phase Zr. The present findings provide an alternate route for Zr metal strengthening by high-pressure phase transformation.
Keywords
Applied physics; Condensed-matter physics; Structural materials
Disciplines
Astrophysics and Astronomy
Repository Citation
Yu, X.,
Zhao, Y.,
Zhang, R.,
Weldon, D.,
Vogel, S. C.,
Zhang, J.,
Brown, D. W.,
Wang, Y.,
Reiche, H. M.,
Wang, S.,
Du, S.,
Jin, C.
(2015).
High Pressure Phase-Transformation Induced Texture Evolution and Strengthening in Zirconium Metal: Experiment and Modeling..
Scientific Reports, 5
12552.
http://dx.doi.org/10.1038/srep12552