期刊
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
卷 126, 期 -, 页码 13-17出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijmachtools.2017.12.003
关键词
Deformation structure; Titanium alloys; Twinning; Machining; Electron backscattering diffraction (EBSD)
资金
- Defence Materials Technology Centre (DMTC)
- Australian Government's Defence Future Capability Technology Centres Programme
The complex microstructure of segmented chips and the changing deformation mechanisms during the machining of the Ti-6Al-4V alloy for a given cutting tool have been explored. Chip geometry and microstructure were investigated for increasing volumes of material removed at a cutting speed at which the tool characteristically develops gradual flank wear. The degree of chip segmentation and deformation mode changed significantly as machining progressed from using a new tool towards a worn tool. Chip formation processes when machining near the end of the cutting tool life is characterised by increasing amounts of twinning formed through both tension and compression.
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