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Wang, Lihua; Teng, Jiao; Kong, Deli; Yu, Guanghua; Zou, Jin; Zhang, Ze; Han, Xiaodong
Scripta materialia, 04/2018, Letnik: 147Journal Article
The atomic-scale in situ tensile tests of twin-structured Pt (d = ~25 nm) nanocrystals were conducted using a home-made device in a high-resolution transmission electron microscope. We showed that the twin-structured Pt nanocrystals exhibit as large as 21.9% homogeneous elongation before crack emergence. The atomic-scale and time-resolved in situ investigation indicated that, full and partial dislocations that intersect with coherent twin boundaries (TBs), as well as TB migration resulting from partial dislocations glide adjacent to the TBs, and the rapid migration of incoherent TBs all contribute the large homogeneous elongation capability of the twin-structured nanocrystals. Display omitted
