Magnesium (Mg) and its alloys are among the lightest metallic structural materials, making them very attractive for use in the aerospace and automotive industries. Recently, Mg has been used in metal matrix composites (MMCs), demonstrating significant improvements in mechanical performance. However, the machinability of Mg-based MMCs is still largely elusive. In this study, Mg-based MMCs are machined using a wide range of cutting speeds in order to elucidate both the chip morphology and chip formation mechanism. Cutting speed is found to have the most significant influence on both the chip morphology and chip formation mechanism, with the propensity of discontinuous, particle-type chip formation increasing as the cutting speed increases. Saw-tooth chips are found to be the primary chip morphology at low cutting speeds (lower than 0.5 m/s), while discontinuous, particle-type chips prevail at high cutting speeds (higher than 1.0 m/s). Using in situ high speed imaging, the formation of the saw-tooth chip morphology is found to be due to crack initiation at the free surface. However, as the cutting speed (and strain rate) increases, the formation of the discontinuous, particle-type chip morphology is found to be due to crack initiation at the tool tip. In addition, the influences of tool rake angle, particle size, and particle volume fracture are investigated and found to have little effect on the chip morphology and chip formation mechanism.
Skip Nav Destination
ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing
June 4–8, 2017
Los Angeles, California, USA
Conference Sponsors:
- Manufacturing Engineering Division
ISBN:
978-0-7918-5073-2
PROCEEDINGS PAPER
Study of Chip Morphology and Chip Formation Mechanism During Machining of Magnesium-Based Metal Matrix Composites
Brian Davis,
Brian Davis
University of Florida, Gainesville, FL
Search for other works by this author on:
David Dabrow,
David Dabrow
University of Florida, Gainesville, FL
Search for other works by this author on:
Licheng Ju,
Licheng Ju
Florida State University, Tallahassee, FL
Search for other works by this author on:
Chengying Xu,
Chengying Xu
Florida State University, Tallahassee, FL
Search for other works by this author on:
Yong Huang
Yong Huang
University of Florida, Gainesville, FL
Search for other works by this author on:
Brian Davis
University of Florida, Gainesville, FL
David Dabrow
University of Florida, Gainesville, FL
Licheng Ju
Florida State University, Tallahassee, FL
Anhai Li
University of Florida, Gainesville, FL
Chengying Xu
Florida State University, Tallahassee, FL
Yong Huang
University of Florida, Gainesville, FL
Paper No:
MSEC2017-3052, V002T03A008; 9 pages
Published Online:
July 24, 2017
Citation
Davis, B, Dabrow, D, Ju, L, Li, A, Xu, C, & Huang, Y. "Study of Chip Morphology and Chip Formation Mechanism During Machining of Magnesium-Based Metal Matrix Composites." Proceedings of the ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. Volume 2: Additive Manufacturing; Materials. Los Angeles, California, USA. June 4–8, 2017. V002T03A008. ASME. https://doi.org/10.1115/MSEC2017-3052
Download citation file:
13
Views
Related Proceedings Papers
Related Articles
Study of Chip Morphology and Chip Formation Mechanism During Machining of Magnesium-Based Metal Matrix Composites
J. Manuf. Sci. Eng (September,2017)
The Effect of Workpiece Temperature on the Machinability of an Aluminum/SiC MMC
J. Manuf. Sci. Eng (August,1996)
A Physics-Based Model for Metal Matrix Composites Deformation During Machining: A Modified Constitutive Equation
J. Eng. Mater. Technol (January,2017)
Related Chapters
Dissolution and Hydrogen Diffusion Control of IGSCC in Sensitized Aluminum-Magnesium Alloys
International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions
Research on Deformation of Aerospace Thin-Walled Structure Part in NC Machining Process
International Conference on Instrumentation, Measurement, Circuits and Systems (ICIMCS 2011)
Modeling of Cutting Force in Vibration-Assisted Machining
Vibration Assisted Machining: Theory, Modelling and Applications