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Chin. Phys. B, 2014, Vol. 23(6): 066802    DOI: 10.1088/1674-1056/23/6/066802
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

Atomic diffusion across Ni50Ti50–Cu explosive welding interface:Diffusion layer thickness and atomic concentration distribution

Chen Shi-Yanga, Wu Zhen-Weia, Liu Kai-Xina 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
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.
Keywords:  diffusion      interfaces      explosive welding      molecular dynamics  
Received:  07 October 2013      Revised:  11 December 2013      Published:  15 June 2014
PACS:  68.35.Fx (Diffusion; interface formation)  
  02.70.Ns (Molecular dynamics and particle methods)  
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

Cite this article: 

Chen Shi-Yang, Wu Zhen-Wei, Liu Kai-Xin 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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