This is the Part II of a two-part series numerical study which investigates the improvement of surface integrity of AZ31B-O magnesium (Mg) alloy by cryogenic cutting. In Part I, material constitutive behavior and grain refinement mechanism of AZ31B-O Mg alloy under cryogenic cutting conditions were modeled based on both slip and twinning mechanisms. In this study, the material model is implemented in the two-pass cryogenic cutting finite element simulations using a commercial machining simulation software package of AdvantEdge 6.4. The microstructural evolution by nanocrystalline grain refinement and other improvement of the surface integrity of AZ31B-O Mg alloy after cryogenic cutting are simulated. With quantitative assessments, simulation results are further discussed in grain refinement, microhardness change, residual stress, and slip/twinning mechanism in the machined surface of Mg alloy by cryogenic cutting. The results show that the surface integrity of Mg components can be significantly improved by using cryogenic cooling and a larger tool edge radius.
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ASME 2015 International Manufacturing Science and Engineering Conference
June 8–12, 2015
Charlotte, North Carolina, USA
Conference Sponsors:
- Manufacturing Engineering Division
ISBN:
978-0-7918-5682-6
PROCEEDINGS PAPER
Cryogenic Cutting of AZ31B-O Mg Alloy for Improved Surface Integrity: Part II — Physics-Based Process Modeling of Surface Microstructural Alteration
Ninggang Shen,
Ninggang Shen
University of Iowa, Iowa City, IA
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Hongtao Ding,
Hongtao Ding
University of Iowa, Iowa City, IA
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Jiaying Gao
Jiaying Gao
University of Iowa, Iowa City, IA
Search for other works by this author on:
Ninggang Shen
University of Iowa, Iowa City, IA
Hongtao Ding
University of Iowa, Iowa City, IA
Jiaying Gao
University of Iowa, Iowa City, IA
Paper No:
MSEC2015-9324, V001T02A105; 9 pages
Published Online:
September 25, 2015
Citation
Shen, N, Ding, H, & Gao, J. "Cryogenic Cutting of AZ31B-O Mg Alloy for Improved Surface Integrity: Part II — Physics-Based Process Modeling of Surface Microstructural Alteration." Proceedings of the ASME 2015 International Manufacturing Science and Engineering Conference. Volume 1: Processing. Charlotte, North Carolina, USA. June 8–12, 2015. V001T02A105. ASME. https://doi.org/10.1115/MSEC2015-9324
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