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Author Ye, Chang ♦ Ren, Zhencheng ♦ Zhao, Jingyi ♦ Hou, Xiaoning ♦ Dong, Yalin ♦ Liu, Yang ♦ Sang, Xiahan
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ AMORPHOUS STATE ♦ DISLOCATIONS ♦ EMISSION ♦ FREE ENTHALPY ♦ GRAIN BOUNDARIES ♦ LASERS ♦ NANOSTRUCTURES ♦ NICKEL ♦ PROCESSING ♦ RESOLUTION ♦ SHOT PEENING ♦ TRANSMISSION ELECTRON MICROSCOPY
Abstract In this study, complete solid state amorphization in nanocrystalline nickel has been achieved through cryogenic laser shock peening (CLSP). High resolution transmission electron microscopy has revealed the complete amorphous structure of the sample after CLSP processing. A molecular dynamic model has been used to investigate material behavior during the shock loading and the effects of nanoscale grain boundaries on the amorphization process. It has been found that the initial nanoscale grain boundaries increase the initial Gibbs free energy before plastic deformation and also serve as dislocation emission sources during plastic deformation to contribute to defect density increase, leading to the amorphization of pure nanocrystalline nickel.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-10-07
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 118
Issue Number 13


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