Effects of crystallographic orientation and negative rake angle on the brittle-ductile transition and subsurface deformation in machining of monocrystalline germanium
Effects of crystallographic orientation and negative rake angle on the brittle-ductile transition and subsurface deformation in machining of monocrystalline germanium
复制标题
晶体取向和负前角对单晶锗加工脆塑转变和亚表面变形的影响
DOI：
10.1016/j.precisioneng.2018.11.011
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发表时间：
2019-03-01
影响因子：
3.6
通讯作者：
Bi, Minghai
中科院分区：
文献类型：
--
作者：
Lai, Min;Zhang, Xiaodong;Bi, Minghai
在这项研究中，利用金刚石刀具进行了锥度切削实验，以研究负前角和切削方向对在（100）、（101）和（111）晶面上切削的单晶锗的脆 - 韧转变和亚表面变形的影响。共聚焦激光扫描显微镜和拉曼光谱分别被用于观察样品的三维表面形貌以及表征亚表面变形。结果表明，负前角和晶体取向对单晶锗延性域加工中的脆 - 韧转变和亚表面变形机制有显著影响。大的负前角改变了初始表面裂纹模式，以及单晶锗的延性 - 脆性转变和亚表面变形的各向异性行为。
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.