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Metals 2017, 7(10), 407; https://doi.org/10.3390/met7100407

Numerical Simulation of Ti/Al Bimetal Composite Fabricated by Explosive Welding

1
School of Material Science and Engineering, Taiyuan University of Science and Technology, No. 66 Waliu Road, Taiyuan 030024, China
2
School of Mechanical Engineering, Taiyuan University of Science and Technology, No. 66 Waliu Road, Taiyuan 030024, China
3
Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
*
Author to whom correspondence should be addressed.
Received: 17 August 2017 / Revised: 20 September 2017 / Accepted: 25 September 2017 / Published: 1 October 2017
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Abstract

In this paper, a 2D numerical model that is more physically realistic was established to simulate the complete process of Ti/Al explosive welding. Basing on the ANSYS/AUTODYN software package, the smoothed particle hydrodynamics (SPH) and arbitrary Lagrangian-Eulerian (ALE) were used for running this simulation. The numerical model can capture the typical physics in the explosive welding process, including the expansion of explosives, flyer plate bending, the impact of metal plates, jetting, and the wavy interface. The variable physical parameters during the explosive welding process were discussed. Most parts of the jet originated from the aluminum plate. According to the model, the jet velocity reached 7402 m/s. The pressure at the detonation point was too small to make the two plates to bond. The pressure could reach an order of magnitude of 107 kPa when the detonation energy tended to be stable and was far more than the yield strength of both materials, which resulted in an obvious narrow region of plastic strain emerging close to the collision zone. The signs of shear stresses between the two plates were the opposite. The interface morphology changed from straight to wave along the propagation of the detonation wave in the simulation, which was consistent with the experimental results. View Full-Text
Keywords: explosive welding; numerical simulation; Ti/Al bimetal composite; smoothed particle hydrodynamics explosive welding; numerical simulation; Ti/Al bimetal composite; smoothed particle hydrodynamics
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Li, Y.; Liu, C.; Yu, H.; Zhao, F.; Wu, Z. Numerical Simulation of Ti/Al Bimetal Composite Fabricated by Explosive Welding. Metals 2017, 7, 407.

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