An investigation of mechanical-thermal coupling treatment on material properties, surface roughness, and cutting force of Inconel 718

Renjie Ji, Qian Zheng, Yonghong Liu, Suet To, Wai Sze Yip, Zelin Yang, Hui Jin, Haoyu Wang, Baoping Cai, Weihai Cheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


It is common that Inconel 718 is difficult to cut, which limits its application unavoidably. In this study, the mechanical-thermal coupling (MTC) treatment method is applied to improve the machinability of Inconel 718. After MTC treatment on Inconel 718 surface, the severe plastic deformation is produced easily, and the grain is refined without new substance produced. Moreover, a theoretical and computational model taking account of the electric field, thermal field, and mechanical field simultaneously is proposed so as to predict the temperature and stress distributions during MTC treatment. Furthermore, the influence of peak current during MTC treatment on the material properties and the machinability of Inconel 718 in ultra-precision machining have been investigated. Results show that the workpiece surface grain size decreases and the thickness of the deformation layer increases with the increasing peak current. Moreover, with the appropriate MTC parameters, the small cutting force and the high cutting surface quality are obtained compared without MTC treatment, so MTC treatment can be used as an effective method for improving the machinability of Inconel 718 without deteriorating its base material performance, which is in favor of the application of the treated workpiece after machining.

Original languageEnglish
Pages (from-to)1917-1931
Number of pages15
JournalInternational Journal of Advanced Manufacturing Technology
Issue number5-6
Publication statusPublished - 6 Sep 2019


  • Inconel 718
  • Machining performance
  • Material property
  • Mechanical-thermal coupling treatment
  • Ultra-precision machining

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Software
  • Mechanical Engineering
  • Computer Science Applications
  • Industrial and Manufacturing Engineering

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