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Open AccessArticle

Percent Reduction in Transverse Rupture Strength of Metal Matrix Diamond Segments Analysed via Discrete-Element Simulations

by Xiuyu Chen 1,2, Guoqin Huang 1,2,3,*, Yuanqiang Tan 1,2,3, Yiqing Yu 1,2, Hua Guo 1,2,3 and Xipeng Xu 1,2,3
1
Institute of Manufacturing Engineering, Huaqiao University, Xiamen 361021, China
2
MOE Engineering Research Center for Machining of Brittle Materials, Huaqiao University, Xiamen 361021, China
3
Fujian Engineering Research Center of Intelligent Manufacturing for Brittle Materials, Fujian 361021, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(6), 1048; https://doi.org/10.3390/ma11061048
Received: 25 April 2018 / Revised: 5 June 2018 / Accepted: 13 June 2018 / Published: 20 June 2018
The percent TRS reduction, DTRS, which is the percent reduction of the transverse rupture strength of metal matrix diamond segments with or without diamonds, is a key metric for evaluating the bonding condition of diamonds in a matrix. In this work, we build, calibrate, and verify a discrete-element simulation of a metal matrix diamond segment to obtain DTRS for diamond segments with various diamond-grain sizes, concentrations, and distributions. The results indicate that DTRS increases with increasing diamond-grain concentration and decreases with increasing diamond-grain size. Both factors can be explained by the total diamond contact length, the increase of which causes the increase in DTRS. The distribution of diamond grains in segments also strongly influences the increase of DTRS. The use of DTRS as a metric to assess the bonding condition of diamonds in matrixes is not valid unless the diamond-grain size, concentration, and distribution and total diamond contact length are the same for all diamond segments under consideration. View Full-Text
Keywords: diamond segment; transverse rupture strength; discrete-element model; metal matrix; bonding strength diamond segment; transverse rupture strength; discrete-element model; metal matrix; bonding strength
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Chen, X.; Huang, G.; Tan, Y.; Yu, Y.; Guo, H.; Xu, X. Percent Reduction in Transverse Rupture Strength of Metal Matrix Diamond Segments Analysed via Discrete-Element Simulations. Materials 2018, 11, 1048.

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