Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1574095 | Materials Science and Engineering: A | 2015 | 7 Pages |
Abstract
Plasticity in magnesium crystals oriented for c-axis compression has been usually attributed to ãc+aã dislocation slip on second-order pyramidal {112¯2} planes. Through molecular dynamics simulations, we investigated the formation and slip characteristics of ãc+aã dislocations on second-order pyramidal planes. It is shown that the critical c-axis compressive stress for these dislocations is almost seven times that for ãc+aã dislocations on first-order pyramidal {101¯1} planes. In particular, it is concluded that first-order pyramidal near-screw ãc+aã dislocations play a predominant role during the c-axis compression of magnesium crystals. Careful reexaminations of published experimental observations show good agreements with the current predictions.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Haidong Fan, Jaafar A. El-Awady,