Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5455492 | Materials Science and Engineering: A | 2017 | 16 Pages |
Abstract
A study regarding the influence of {101¯2} twins on hardening of prismatic slip and basal slip was performed. To this end, a rolled Mg AZ31 with and without {101¯2} twins was tensioned along the transverse direction and at 45° from the normal direction to activate prismatic slip and basal slip predominant deformations, respectively. The results show that grain refinement by {101¯2} twins is more effective to strengthen basal slip (28 MPa increment in yield strength) than prismatic slip (11 MPa increment). It is shown that a lower geometric compatibility factor (mâ²) for basal slip transfer than prismatic slip transfer across boundaries exists in the pre-twinned samples, indicating a higher boundary obstacle effect. {101¯2} twin boundary with a basal pole inclined by 86° generates a lower mâ² for basal slip transfer than that for prismatic slip transfer. This together with the high fractions of twin boundaries account for the lower mâ² for basal slip transfer than that for prismatic slip transfer in the pre-twinned sample.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Huihui Yu, Yunchang Xin, Yao Cheng, Bo Guan, Maoyin Wang, Qing Liu,