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Effects of electropulsing on the machinability and microstructure of GH4169 superalloy during turning process

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Abstract

The effects of electropulsing on the machinability and microstructure of the machined surface of GH4169 superalloy are investigated in the present work. The results indicate that the machinability and the surface quality of GH4169 superalloy achieve evident improvements during the electropulsing-assisted turning process (EP-TP) at appropriate electropulsing parameters compared with the traditional dry turning process (TD-TP). In EP-TP at the frequency of 400 Hz and the root-mean-square (RMS) current density of 0.64 A mm−2, the main cutting force, the axial surface roughness, and the surface microhardness are reduced dramatically. In addition, the quality of machined surface and the ability of plastic deformation are also facilitated significantly under the effects of electropulsing. For GH4169 superalloy, the enhanced ability of the plastic deformation and the promoted mobility of dislocations in the cutting layer under the influence of the coupling of thermal and athermal effects of the exerted electropulsing are likely the primary reasons for the observed phenomena.

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Funding

The authors wish to acknowledge the financial support from the Engineering Laboratory Project of Shenzhen Development and Reform Commission (No. 2015-1033) and the Shenzhen Science and Technology supporting Plan Project (No. GJHS20160331183313435).

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Authors and Affiliations

  1. Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, People’s Republic of China

    Z. Sun, H. Wang, Y. Ye, Z. Xu & G. Tang

  2. School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People’s Republic of China

    Z. Sun, H. Wang, Y. Ye & Z. Xu

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  1. Z. Sun
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  2. H. Wang
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Correspondence to G. Tang.

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Sun, Z., Wang, H., Ye, Y. et al. Effects of electropulsing on the machinability and microstructure of GH4169 superalloy during turning process. Int J Adv Manuf Technol 95, 2835–2842 (2018). https://doi.org/10.1007/s00170-017-1407-6

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