Open AccessInteraction of Glide Dislocations with Extended Precipitates in Mg-Nd alloys
Author(s) -
Zhengdong Huang,
J. Allison,
Amit Misra
Publication year - 2018
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/s41598-018-20629-1
Subject(s) - glide plane , dislocation , materials science , bowing , indentation , crystallography , condensed matter physics , phase (matter) , composite material , chemistry , physics , organic chemistry , philosophy , theology
The unit processes of precipitate-dislocation interaction in dilute Mg-Nd alloys are elucidated through in situ indentation experiments in TEM. Results suggest that pinned dislocations can glide along the broad facets of extended β 1 precipitates, a common strengthening phase in Mg- rare earth (RE) alloys. A dislocation-theory based analysis suggests that the shape, spacing and orientation (with respect to the glide plane) of β 1 precipitates may favor glide of pinned dislocations along interfaces as opposed to the classical mechanism of bowing and looping around the precipitate.