Journal of Northeastern University Natural Science ›› 2020, Vol. 41 ›› Issue (1): 95-100.DOI: 10.12068/j.issn.1005-3026.2020.01.017

• Mechanical Engineering • Previous Articles     Next Articles

Numerical Simulation of Thermal-Fluid Coupling in Ultrasonic Vibration Assisted Friction Surfacing

REN Zhao-hui, ZHANG Yan, JU Jian-zhong, ZHANG Lu   

  1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China.
  • Received:2019-04-04 Revised:2019-04-04 Online:2020-01-15 Published:2020-02-01
  • Contact: REN Zhao-hui
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Abstract: Traditional friction surfacing has a single energy input form. As the strength of the welded material increases, the larger axial pressure and torque need to be applied during the surfacing process, which greatly limit its application. In order to solve the above problem, a new ultrasonic vibration assisted friction surfacing technology with ultrasonic vibration applied to the substrate in front of the consumable rod was presented. Taking Ti-6Al-4V as the research object, a three-dimensional numerical model of thermal-fluid coupling was established based on the ultrasonic softening effect. The effects of ultrasonic vibration with different amplitudes on the temperature field and material flow behavior were quantitatively analyzed. The calculation results show that the preheating effect of ultrasonic vibration is not obvious. With the increase of amplitude, ultrasonic vibration can significantly increase the flow velocity of plastic material in the fusion zone, decrease the material’s viscosity and expand the flow region of plastic material.

Key words: friction surfacing, ultrasonic vibration, ultrasonic softening, material flow, numerical simulation

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