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Chuanzhen Huang,Hongtao Zhu,Xinyu Lu,Quanlai Li,Cuilian Che 한국정밀공학회 2008 International Journal of Precision Engineering and Vol.9 No.2
Critical erosion kinetic energy models for radial/median cracks and lateral cracks in a workpiece are established in this study. We used experimental results to demonstrate that the fracture erosion resistance and erosion machining number could be used to evaluate the brittle fracture resistance and machinability of a workpiece. Erosion kinetic energy models were developed to predict brittle fracture and ductile shear, and a critical erosion kinetic energy model was developed to predict the transition from brittle fracture to ductile shear. These models were verified experimentally.
Huang, Chuanzhen,Zhu, Hongtao,Lu, Xinyu,Li, Quanlai,Che, Cuilian Korean Society for Precision Engineering 2008 International Journal of Precision Engineering and Vol.9 No.2
Critical erosion kinetic energy models for radial/median cracks and lateral cracks in a workpiece are established in this study. We used experimental results to demonstrate that the fracture erosion resistance and erosion machining number could be used to evaluate the brittle fracture resistance and machinability of a workpiece. Erosion kinetic energy models were developed to predict brittle fracture and ductile shear, and a critical erosion kinetic energy model was developed to predict the transition from brittle fracture to ductile shear. These models were verified experimentally.
Ch Asad Abbas,Huang Chuanzhen,Huma Hafeez,Li Binghao,Liu Hanlian 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.10
In this study, investigation of aluminum-silicon carbide (Al/SiC) with and without cryogenic treated drills has been performed. The influence of drill treatment condition coupled with processing parameters on machinability of Al/SiC was observed in terms of thrust forces, drill vibration and hole surface integrity. It was observed that the cryogenic treatment is suitable to enhance the machinability of Al/SiC as it does not alter the drill morphology and reduce various drilling related issues. Cryogenic treatment increased drill hardness and reduced thrust force and drill vibration. Vibration acceleration decreases from 110 m/sec 2 to 98 m/sec 2 and 92 m/sec 2at maximum feed rate, with 24 hrs and 48 hrs cryogenic treatment, respectively. The reduction in drilling vibrations was the influential parameters that reduced drill diameter, delamination and surface roughness of the workpiece. Surface roughness was improved from Ra 1.96 µm to 1.7 µm at maximum feed rate with 24 hrs and 48 hrs cryogenic treatment, respectively.