TY - JOUR
T1 - Revisit of the anisotropic deformation behavior of single-crystal CaF2 in orthogonal cutting
AU - Mizumoto, Yuta
AU - Kakinuma, Yasuhiro
N1 - Funding Information:
This study was partially supported by JSPS Research Fellow Grant Number 16J03359 . The authors would like to express their sincere appreciation for the support.
Publisher Copyright:
© 2018 Elsevier Inc.
PY - 2018/7
Y1 - 2018/7
N2 - A resolved stress model is presented to re-discuss the anisotropic deformation mechanism of single-crystal calcium fluoride in plunge-cut tests. The authors have investigated the machinability of CaF2 in ultra-precision cutting. However, the influence of crystal anisotropy on the brittle–ductile transition was discussed in a qualitative manner using optical microscopy and white light interferometer. Moreover, only the primary {100}<110> slip system and {111} cleavage were considered as deformation mechanisms. In this study, the ductility and brittleness of CaF2 is semi-quantitatively re-discussed on the basis of computation of the resolved stresses, by considering a secondary slip system and cleavage. The surface morphologies of the machined surface were characterized using field-emission scanning electron microscopy. The primary {100}<110> slip system is assumed to be dominant for the ductility. The brittle fracture initiated by the {111} cleavages was observed in a different manner in dependency rwith cutting directions.
AB - A resolved stress model is presented to re-discuss the anisotropic deformation mechanism of single-crystal calcium fluoride in plunge-cut tests. The authors have investigated the machinability of CaF2 in ultra-precision cutting. However, the influence of crystal anisotropy on the brittle–ductile transition was discussed in a qualitative manner using optical microscopy and white light interferometer. Moreover, only the primary {100}<110> slip system and {111} cleavage were considered as deformation mechanisms. In this study, the ductility and brittleness of CaF2 is semi-quantitatively re-discussed on the basis of computation of the resolved stresses, by considering a secondary slip system and cleavage. The surface morphologies of the machined surface were characterized using field-emission scanning electron microscopy. The primary {100}<110> slip system is assumed to be dominant for the ductility. The brittle fracture initiated by the {111} cleavages was observed in a different manner in dependency rwith cutting directions.
KW - Brittle-ductile transition
KW - Crystal anisotropy
KW - Orthogonal cutting
KW - Resolved stress model
KW - Single-Crystal CaF
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U2 - 10.1016/j.precisioneng.2018.01.011
DO - 10.1016/j.precisioneng.2018.01.011
M3 - Article
AN - SCOPUS:85045013937
SN - 0141-6359
VL - 53
SP - 9
EP - 16
JO - Precision Engineering
JF - Precision Engineering
ER -