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

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.