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

  • Renjie JiEmail author
  • Qian Zheng
  • Yonghong Liu
  • Suet ToEmail author
  • Wai Sze Yip
  • Zelin Yang
  • Hui Jin
  • Haoyu Wang
  • Baoping Cai
  • Weihai Cheng


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.


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


Funding information

This work was supported by the National Natural Science Foundation of China (Grant No. 51675535), the Major Research Project of Shandong Province (Grant No. 2019GGX104068), the Key Pre-Research Foundation of Military Equipment of China (Grant No. 6140923030702), and the Fundamental Research Funds for Central Universities (Grant No. 17CX02058).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.


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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2019

Authors and Affiliations

  • Renjie Ji
    • 1
    • 2
    Email author
  • Qian Zheng
    • 1
  • Yonghong Liu
    • 1
  • Suet To
    • 2
    Email author
  • Wai Sze Yip
    • 2
  • Zelin Yang
    • 1
  • Hui Jin
    • 1
  • Haoyu Wang
    • 1
  • Baoping Cai
    • 1
  • Weihai Cheng
    • 1
  1. 1.College of Mechanical and Electronic EngineeringChina University of Petroleum (East China)QingdaoPeople’s Republic of China
  2. 2.State Key Laboratory in Ultra-Precision Machining Technology, Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHong KongPeople’s Republic of China

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