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; cutting parameters; surface roughness; cut and break ratio; surface qualities; optimal cutting condition  ... section in the laser cutting of a metallic sheet can be evaluated by the surface roughness, the formation of striations and the formation of the cut and break area. KARATAS et al[13] investigated......
J. Cent. South Univ. Technol. (2007)04-0504-05 DOI: 10.1007/s11771-007-0098-9 Determination of volatile components in cut tobacco with gas chromatography–mass spectrometry and chemometric... of cut tobacco samples with the help of heuristic evolving latent projections (HELP). After extracting with simultaneous distillation and extraction method, the volatile components in cut tobacco were......
J. Cent. South Univ. (2020) 27: 2959-2970 DOI: https://doi.org/10.1007/s11771-020-4521-9 In-site core disking phenomenon and break mechanism of hard marble: Investigation in 2400 m deep-buried... characteristics of core-disks’ break surface were analysis, using 3D optical scanning and electron microscope scanning. Moreover, the numerical back analysis was also used to simulate the drilling process......
Numerical simulation of parallel hole cut blasting with uncharged holesShijie Qu Xiangbin Zheng Lihua Fan Ying Wang School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China摘 要:<正>The cavity formation and propagation process of stress wave from parallel hole cut blasting was simulated......
J. Cent. South Univ. Technol. (2011) 18: 1518-1524 DOI: 10.1007/s11771-011-0868-2 Characteristics of different rocks cut by helical cutting mechanism LIU Song-yong(刘送永), DU Chang-long(杜长龙), CUI... Berlin Heidelberg 2011 Abstract: To research the loading characteristic of rocks with different structures cut by helical cutting mechanism (HCM), three different structures of rock (hard-soft-hard......
Effect of extrusion ratio on microstructure and mechanical properties of AZ91D magnesium alloy recycled from scraps by hot extrusion HU Mao-liang(胡茂良), JI Ze-sheng(吉泽升), CHEN Xiao-yu(陈晓瑜... the scraps were extruded with the extrusion ratio of 40?1. Oxidation layers of the scraps were broken into pieces by high compressive and shear forces under the extrusion ratio of 40?1. The ultimate tensile......
with extrusion ratio of 100 was successfully applied to AZ31 Mg alloy at extrusion temperatures of 250, 300, and 350 ℃. This leads to both grain refinement due to grain break and the occurrence... Microstructure and mechanical properties of AZ31 Mg alloy processed by high ratio extrusion CHEN Yong-jun(陈勇军), WANG Qu-dong(王渠东), LIN Jin-bao(林金宝), ZHANG Lu-jun(张陆军), ZHAI Chun-quan(翟春泉......
J. Cent. South Univ. (2016) 23: 3079-3084 DOI: 10.1007/s11771-016-3372-x Effects of MgO content and CaO/Al2O3 ratio on surface tension of calcium aluminate refining slag XU Ji-fang(许继芳)1, ZHANG Jie... method at 1823 K. Based on different levels of the MgO content and the mass ratio of CaO to Al2O3, the effects of MgO content and the mass ratio of CaO to Al2O3 on surface tension were investigated......
J. Cent. South Univ. (2016) 23: 2669-2675 DOI: 10.1007/s11771-016-3328-1 Mass ratio design based on compaction properties of backfill materials LI Meng(李猛), ZHANG Ji-xiong(张吉雄), HUANG Peng(黄鹏), GAO... Berlin Heidelberg 2016 Abstract: The backfill-mining mass ratio is the ratio of the mass of the backfill materials in the goaf to the mass of the produced raw coal during solid backfill mining......
Warm hydroforming of magnesium alloy tube with large expansion ratio LIU Gang(刘 钢), TANG Ze-jun(汤泽军), HE Zhu-bin(何祝斌), YUAN Shi-jian(苑世剑) School of Materials Science and Engineering, Harbin... alloy tubular part with a large expansion ratio. Effects of temperature on the mechanical properties and formability were studied by uniaxial tensile test and hydraulic bulge test. Total elongation......