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

doi:10.1088/1674-1056/23/6/066802

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
Accepted manuscript online:

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

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