About this Abstract |
Meeting |
12th International Conference on Magnesium Alloys and their Applications (Mg2021)
|
Symposium
|
12th International Conference on Magnesium Alloys and their Applications (Mg 2021)
|
Presentation Title |
Disproof of Pyramidal <c+a> Slip in Magnesium |
Author(s) |
Yan Huang |
On-Site Speaker (Planned) |
Yan Huang |
Abstract Scope |
The current studies and understanding of magnesium deformation related to non-basal pyramidal <c+a> dislocations are critically discussed. The atomic configurations and crystallographic features in association with non-basal pyramidal <c+a> dislocations 1/3<11-23>{11-22} and 1/3<11-23>{10-11} have been unambiguously revealed for the first time using computer software, demonstrating that possible <c+a> dislocation core structures would involve too many atoms on multiple lattice planes and the dislocations are physically impossible. Magnesium single crystals were compressed along its hexagonal c-axis and the deformation mechanisms and fracture behaviour were fully characterized. Experimental results showed no evidence of <c+a> slip during deformation and fracture over the full range of temperatures tested from 20 deg C to 500 deg C. |
Proceedings Inclusion? |
Planned: At-meeting proceedings |