| About this Abstract |
| Meeting |
6th World Congress on Integrated Computational Materials Engineering (ICME 2022)
|
| Symposium
|
6th World Congress on Integrated Computational Materials Engineering (ICME 2022)
|
| Presentation Title |
A Multiscale Approach on Strategy to Mitigate Deformation Twinning in Magnesium Alloys |
| Author(s) |
Yubraj Paudel, Christopher Barrett, Hongjoo Rhee, Haitham El Kadiri |
| On-Site Speaker (Planned) |
Yubraj Paudel |
| Abstract Scope |
Deformation twinning in magnesium alloys serves as a “double-edged sword” mechanism while providing easy deformation and strain hardening but resulting in strain-path anisotropy, asymmetry, and damage initiation. In typical texture conditions, twin nucleates at the grain boundaries, propagates along the grain and propagates across the grains through the autocatalysis phenomena. Twin interactions with other twin and slip systems often lead to high strain incompatibilities and, eventually, brittle failure. Strain-energy study through a micromechanics-based solution showed the twin evolution in the strongly textured Mg alloy. Based on experimental and simulation results, we hypothesized that a strong, yet ductile, eutectic surrounding each grain in traditional polycrystals could inhibit twin accommodation effects and thus twin nucleation and autocatalysis mechanisms at grain boundaries. A proof-of-concept experiment on sharply textured magnesium sheets plated with different materials subjected to four-point bending showed the potential of a surface/grain boundary barrier in limiting twinning extent. |
| Proceedings Inclusion? |
Definite: Other |