Doctorates Yuntian Zhu and Jay Narayan have secured a Top 25 Hottest Articles ranking in Science Direct’s SciVerse. SciVerse is a highly visible resource in the Materials Science community and this is truly an honor for the Department.
The paper which landed the #8 rank was on the subject of “Dislocation-Twin Interactions in Nanocrystalline FCC Metals”. The paper reports that dislocation interaction with an accumulation at twin boundaries significantly improves the strength and ductility of nanostructured face-fentered cubic metals and alloys.
Dislocation interaction with and accumulation at twin boundaries have been reported to significantly improve the strength and ductility of nanostructured face-centered cubic (fcc) metals and alloys. Here we systematically describe plausible dislocation interactions at twin boundaries. Depending on the characteristics of the dislocations and the driving stress, possible dislocation reactions at twin boundaries include cross-slip into the twinning plane to cause twin growth or de-twinning, formation of a sessile stair-rod dislocation at the twin boundary, and transmission across the twin boundary. The energy barriers for these dislocation reactions are described and compared.