Abstract
The presence of complex states-of-stress and strain-rates directly influence the dominant deformation mechanisms operating in a given material under load. Mg alloys have shown limited ambient temperature formability due to the paucity of active slip-mechanisms, however, studies have focused on quasi-static strain-rates and/or simple loading conditions (primarily uniaxial or biaxial). For the first time, the influence of strain-rate and stress-triaxiality is utilized to unravel the active deformation mechanisms operating along the rolling, transverse- and normal-directions in wrought AZ31-alloy. It is discovered that the activation of various twin-mechanisms in the presence of multiaxial loading is governed by the energetics of the applied strain-rates. [Image Presented] IMPACT STATEMENT It is shown for the first time that the higher deformation energy associated with dynamic strain-rates, coupled with high-triaxiality, promotes detwinning and texture evolution in HCP alloys with high c/a ratio.
Original language | English (US) |
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Pages (from-to) | 152-158 |
Number of pages | 7 |
Journal | Materials Research Letters |
Volume | 6 |
Issue number | 2 |
DOIs | |
State | Published - Feb 1 2018 |
Keywords
- Detwinning
- Magnesium
- Stress-triaxiality
- Twin–twin interaction
ASJC Scopus subject areas
- Materials Science(all)
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On the roles of stress-triaxiality and strain-rate on the deformation behavior of AZ31 magnesium alloys
Mathaudhu, S. N. (Contributor), Solanki, K. (Contributor), Kale, C. (Contributor), Darling, K. (Contributor), Hornbuckle, B. (Contributor), Rajagopalan, M. (Contributor) & Turnage, S. (Contributor), figshare Academic Research System, Jan 1 2019
DOI: 10.6084/m9.figshare.5739624.v2, https://doi.org/10.6084%2Fm9.figshare.5739624.v2
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