• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2019, Vol. 55 ›› Issue (3): 181-190.doi: 10.3901/JME.2019.03.181

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Research Progress of Ductile Removal Mechanism for Hard-brittle Single Crystal Materials

LI Chen, ZHANG Feihu, ZHANG Xuan, RAO Xiaoshuang   

  1. School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001
  • Received:2018-03-15 Revised:2018-08-15 Online:2019-02-05 Published:2019-02-05

Abstract: In recent years, hard-brittle single crystal materials are wildly used in optics, aerospace, electronics, solid-state laser and other fields due to their high hardness, low density, low thermal expansion coefficient, chemical stability and other characteristics. However, these materials are typical difficult-to-machine materials and brittle-fracture is easily induced in machining process due to their high hardness and low fracture toughness. The ductile-regime machining of hard-brittle single crystal materials has become a hot researching topic in the field of ultra-precision machining. However, the research on ductile removal mechanism of these materials is still in the exploratory stage. The concept of ductile removal for hard-brittle single crystal materials is introduced, the research progress of the ductile removal mechanism for hard-brittle single crystal materials is summarized, the existing problems in the research of ductile removal mechanism of hard-brittle single crystal materials is pointed out, and the future research direction of the ductile removal mechanism for hard-brittle single crystal materials is prospected.

Key words: amorphous, dislocation slip, ductile removal mechanism, hard-brittle single crystal materials, phase transformation, poly-crystalline nano-crystallites

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