NDLI: Influence of cutting parameters on the ductile-brittle transition of single-crystal calcium fluoride during ultra-precision cutting

Content Provider	Springer Nature Link
Author	Chen, Xiao Xu, Jianfeng Fang, Haisheng Tian, Ruiji
Copyright Year	2016
Abstract	The cutting mode transition from ductile to brittle is related to the depth of cut for the machining of brittle materials. The critical depth of cut for ductile to brittle transition (DBT) during single-point diamond turning of single-crystal calcium fluoride was examined, and the effect of cutting direction, cutting speed, and tool rake angles were investigated. Results show that the cutting speed had a slight effect on the critical depth of cut for DBT, while negative rake angle tools yielded large critical depth of cut for DBT. The influence of cutting direction (crystallographic orientation) on the critical depth of cut for DBT was associated to fracture toughness (K C) of the materials. Higher K C values induced larger critical depth for DBT. Furthermore, periodic variations of K C values as a function of the crystallographic orientation correlated well with changes in critical depth ranging between 100 and 600 nm. This resulted in the successive emergence of brittle and ductile cutting regions when a nominal depth of cut of 0.5 μm was used, while it led to the formation of a smooth and homogenous surface with R a of 2.838 nm at a nominal depth of cut of 0.1 μm.
Starting Page	219
Ending Page	225
Page Count	7
File Format	PDF
ISSN	02683768
Journal	The International Journal of Advanced Manufacturing Technology
Volume Number	89
Issue Number	1-4
e-ISSN	14333015
Language	English
Publisher	Springer London
Publisher Date	2016-06-28
Publisher Place	London
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ultra-precision cutting Critical depth of cut Single-crystal calcium fluoride Fracture toughness Industrial and Production Engineering Media Management Mechanical Engineering Computer-Aided Engineering (CAD, CAE) and Design
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Mechanical Engineering Computer Science Applications Software

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