Next Article in Journal
Evaluation of a New Dental Implant Cervical Design in Comparison with a Conventional Design in an Experimental American Foxhound Model
Previous Article in Journal
Restoration of Worn Movable Bridge Props with Use of Bronze Claddings
Open AccessArticle

Influences of Cutting Speed and Material Mechanical Properties on Chip Deformation and Fracture during High-Speed Cutting of Inconel 718

by Bing Wang 1,2,*, Zhanqiang Liu 2,3,*, Xin Hou 2,3 and Jinfu Zhao 2,3
1
School of Materials Science and Engineering, Shandong University, Jinan 250061, China
2
Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE, School of Mechanical Engineering, Shandong University, Jinan 250061, China
3
Key National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(4), 461; https://doi.org/10.3390/ma11040461
Received: 9 February 2018 / Revised: 10 March 2018 / Accepted: 20 March 2018 / Published: 21 March 2018
(This article belongs to the Section Manufacturing Processes and Systems)
The paper aims to investigate the influences of material constitutive and fracture parameters in addition to cutting speed on chip formation during high-speed cutting of Inconel 718. Finite element analyses for chip formation are conducted with Johnson–Cook constitutive and fracture models. Meanwhile, experiments of high-speed orthogonal cutting are performed to verify the simulation results with cutting speeds ranging from 50 m/min to 7000 m/min. The research indicates that the chip morphology transforms from serrated to fragmented at the cutting speed of 7000 m/min due to embrittlement of the workpiece material under ultra-high cutting speeds. The parameter of shear localization sensitivity is put forward to describe the influences of material mechanical properties on serrated chip formation. The results demonstrate that the effects of initial yield stress and thermal softening coefficient on chip shear localization are much more remarkable than the other constitutive parameters. For the material fracture parameters, the effects of initial fracture strain and exponential factor of stress state on chip shear localization are more much prominent. This paper provides guidance for controlling chip formation through the adjustment of material mechanical properties and the selection of appropriate cutting parameters. View Full-Text
Keywords: chip formation; constitutive and fracture parameters; sensitivity analysis; high speed machining; Inconel 718 chip formation; constitutive and fracture parameters; sensitivity analysis; high speed machining; Inconel 718
Show Figures

Figure 1

MDPI and ACS Style

Wang, B.; Liu, Z.; Hou, X.; Zhao, J. Influences of Cutting Speed and Material Mechanical Properties on Chip Deformation and Fracture during High-Speed Cutting of Inconel 718. Materials 2018, 11, 461.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop