期刊
出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.precisioneng.2018.11.011
关键词
Germanium; Crystallographic orientation; Negative rake angle; Brittle-ductile transition; Subsurface deformation
类别
资金
- Science Challenge Project [TZ2018006-0201-01]
- National Natural Science Foundation of China [51605327]
- National key Research and Development Program of China [2016YFB1102203]
- 111 Project by the State Administration of Foreign Experts Affairs
- Ministry of Education of China [B07014]
In this study, taper cutting experiments using a diamond tool were conducted to investigate the effects of negative rake angle and cutting orientation on the brittle-ductile transition and subsurface deformation of monocrystalline germanium cut on the (100), (101), and (111) planes. Confocal laser scanning microscopy and Raman spectroscopy were used to observe the three-dimensional surface topographies of the samples and characterize the subsurface deformation, respectively. The results showed that the negative rake angle and crystallographic orientation have a significant effect on the brittle-ductile transition and subsurface deformation mechanisms in ductile regime machining of monocrystalline germanium. A large negative rake angle alters the initial surface crack patterns, as well as anisotropic behavior of the ductile-brittle transition and subsurface deformation of monocrystalline germanium.
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