Browsing by Author "Asmael, Mohammed"

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    Cutting temperatures in milling operations of difficult-to-cut materials
    (Oum-El-Bouaghi University, 2021) Soori, Mohsen; Asmael, Mohammed
    Due to high strength-to-weight ratio and corrosion resistance, difficult-to-cut materials are used in the aerospace, automotive and medical industries. High mechanical and thermal loading occur during machining operations of difficult-to-cut materials, reducing cutting tool life and machining process performance. So, analyzing the cutting temperatures in milling operations of difficult-to-cut materials can increase the efficiency in production process of the parts from the alloys. Application of the virtual machining system is developed in the study to predict the cutting temperature during machining operations of difficult-to-cut materials such as Inconel 718, Titanium alloy Ti6Al4V and Nickel-base superalloy gH4133B. The modified Johnson–Cook model is used to analyze the coupled effects of strain rate and deformation temperature on flow stress during milling operations of the alloys. The finite element simulation of the milling operations is implemented for the alloys in order to obtain the cutting temperature of the cutting tool and workpiece during chip formation process. To validate the study, the experimental results are compared to the finite element results obtained from the virtual machining system. As a result, the study can provide an effective device in terms of efficiency enhancement of machining operations by analyzing and decreasing the cutting temperature in milling operation of difficult-to-cut materials.
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    Mechanical Behavior Of Materials In Metal Cutting Operations, A Review
    (Oum-El-Bouaghi University, 2020) Soori, Mohsen; Asmael, Mohammed
    Material properties of the machined parts are changed in metal cutting operations due to generated heat and friction in chip formation process. Temperature distributions in cutting zone can be analyzed to prevent the cutting tool failure in machining operations. Stress and strain rate in metal cutting condition, residual stress in the machined parts can be predicted and analyzed in virtual environments in order to increase performances of produced parts in actual working conditions. Material removal rate can be increased due to Simulation and analysis of the friction, flow stress and chip formation process in metal cutting operations. To prevent the workpiece deformation as well as tool deflection error in machining operation, cutting forces can be predicted and analyzed. To increase accuracy in process of part production using machining operation, deformation of workpiece due to applied forces can be analyzed and decreased. Machining operations of hard to cut materials is investigated in order to increase surface roughness of produced parts and cutting tool life in machining operations. In this paper, a review in mechanical behavior of materials during machining operations is presented and future research works are also suggested. It has been observed that the research filed can be moved forward by reviewing and analyzing recent achievements in the published papers.