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Atomic diffusion across Ni50Ti50–Cu explosive welding interface:Diffusion layer thickness and atomic concentration distribution |
Chen Shi-Yang (陈仕洋)a, Wu Zhen-Wei (武振伟)a, Liu Kai-Xin (刘凯欣)a b |
a LTCS and Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100871, China;
b Center for Applied Physics and Technology, Peking University, Beijing 100871, China |
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Abstract Molecular dynamics simulations are carried out to study atomic diffusion in the explosive welding process of Ni50Ti50-Cu (at.%). By using a hybrid method which combines molecular dynamics simulation and classical diffusion theory, the thickness of the diffusion layer and the atomic concentration distribution across the welding interface are obtained. The results indicate that the concentration distribution curves at different times have a geometric similarity. According to the geometric similarity, the atomic concentration distribution at any time in explosive welding can be calculated. Ni50Ti50-Cu explosive welding and scanning electron microscope experiments are done to verify the results. The simulation results and the experimental results are in good agreement.
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Received: 07 October 2013
Revised: 11 December 2013
Accepted manuscript online:
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PACS:
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68.35.Fx
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(Diffusion; interface formation)
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02.70.Ns
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(Molecular dynamics and particle methods)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10732010, 10972010, 11332002, and 11028206). |
Corresponding Authors:
Liu Kai-Xin
E-mail: kliu@pku.edu.cn
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Cite this article:
Chen Shi-Yang (陈仕洋), Wu Zhen-Wei (武振伟), Liu Kai-Xin (刘凯欣) Atomic diffusion across Ni50Ti50–Cu explosive welding interface:Diffusion layer thickness and atomic concentration distribution 2014 Chin. Phys. B 23 066802
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