| Autor: |
Chang Ye, Yang Liu, Xiahan Sang, Zhencheng Ren, Jingyi Zhao, Xiaoning Hou, Yalin Dong |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 10/7/2015, Vol. 118 Issue 13, p134902-1-134902-5, 5p, 1 Color Photograph, 1 Black and White Photograph, 2 Diagrams, 1 Chart, 3 Graphs |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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