Elongation behavior and local amorphization of metallic nanowire with glassy shell and crystalline core
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University - Jinan 250061, PRC
Accepted: 8 December 2011
Dynamic elongation of the core/shell CuZr metallic nanowire (MNW) has been examined by molecular dynamics (MD) methods. Results indicate that the deformation region in the core/shell MNW represents an evident martensitic phase-transforming feature, which subsequently results in local amorphization. Meanwhile, the finite-size effect on the MNW with different crystalline-amorphous ratio is discussed. In addition, Honeycutt and Anderson (HA) bond-type index during elongation provides reliable evidence to explain why these phenomena take place in the MNW. Our results illustrate that the corresponding martensitic phase transformation and local amorphization are closely related to the finite-size effect and crystalline-amorphous interfaces.
PACS: 68.35.-p – Solid surfaces and solid-solid interfaces: structure and energetics / 68.35.bd – Metals and alloys
© EPLA, 2012