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Experimental study on the process of adiabatic shear fracture in isolated segment formation in high-speed machining of hardened steel

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Abstract

Adiabatic shear fracture in serrated chip leads to isolated segment formation in high-speed machining with the further increase of cutting speed. An energy model of adiabatic shear band is built and investigated through high-speed machining tests and chip morphology examination. A quick-stop device designed to obtain chip roots in high-speed turning is applied. The adiabatic shear fracture process on considering the induced mechanism is investigated and the multi-stage physical model of adiabatic shear fracture is proposed through chip root morphology examination. The results show that adiabatic shear fracture in high-speed machining is a periodic process from energy convergence to release. The shear band collapses and results in isolated segments formation when the energy convergence in band exceeds the saturation limit. There are possibilities of utilizing the occurrence of adiabatic shear fracture to reduce the increased rate of stress, temperature, and energy and optimize the machinability in the chip formation aspect in high-speed machining.

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Authors and Affiliations

  1. State key Laboratory of Traction Power & Institute of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, China

    Liyao Gu, Hui Chen & Guozheng Kang

  2. Key Laboratory of the Ministry of Education for Precision and Non-traditional Machining, School of Mechanical Engineering, Dalian University of Technology, Dalian, China

    Liyao Gu & Minjie Wang

Authors
  1. Liyao Gu
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  2. Minjie Wang
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  3. Hui Chen
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  4. Guozheng Kang
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Corresponding authors

Correspondence to Liyao Gu, Minjie Wang or Hui Chen.

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Gu, L., Wang, M., Chen, H. et al. Experimental study on the process of adiabatic shear fracture in isolated segment formation in high-speed machining of hardened steel. Int J Adv Manuf Technol 86, 671–679 (2016). https://doi.org/10.1007/s00170-015-8157-0

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  • DOI: https://doi.org/10.1007/s00170-015-8157-0

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