Yazar "Elkilani, Rajab" seçeneğine göre listele

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    Investigation of Microstructure and Mechanical Properties of Layered Material Produced by Adding Al2O3 to 316L Stainless Steel
    (Mdpi, 2023) Albahlol, Osama Albahl Alshtewe; Elkilani, Rajab; Cug, Harun; Erden, Mehmet Akif; Ozmen, Ramazan; Esen, Ismail
    This study developed new advanced composite materials consisting of functional grading of 316L and Al2O3 specially designed for potential biomedical applications. Mechanical properties were characterized by tensile testing, and microstructural properties by optical microscope, scanning electron microscope (SEM), and Energy Dispersive X-Ray (EDX) analyses. The uniform mixture in the material, up to 40% by weight of Al2O3, is uniformly distributed in the 316L matrix that shows disintegration. Then, samples with 2, 3, 4, and 5 layers were produced in functionally graded 6, 7, 8, and 9 material types, respectively. The layer thicknesses were formed with an average of 900 & mu;m. The results show that new composite materials can be produced functionally using 316L and Al2O3 in a layered manner. As a result of the mechanical experiments, it has been observed that the tensile strength of the layered composite structures remains within the range of 91-191 MPa, depending on the layer type. It has been observed that the elongation varies between 3.16 and 12.46%. According to these results, the materials obtained are considered suitable for use as an alternative prosthetic material in biomedical applications. The tensile strength, % elongation of the Composition 7, and yield strength of functionally graded (316 + (316L-10 Al2O3) + (316L-20 Al2O3) + (316L-30 Al2O3)) material are 123 megapascals (MPa), 7.3%, and 111MPa, respectively, and according to the literature, the mechanical strength of human bone is very close to this composition properties.
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    Properties of Al2O3 particle reinforced composites coating on IF steel
    (Taylor & Francis Ltd, 2022) Demirtas, Huseyin; Cug, Harun; Elkilani, Rajab
    In this study, IF steel was coated by the low-pressure cold spray deposit method with different coating materials. Al, Ni, Zn, and Sn powders were used as coating matrix. All coating materials were reinforced by Al2O3 particles. Mechanical properties of the coatings were determined by three-point bending, scratch, wear tests, and hardness measurement. Micro-level defects and structure of coatings were examined by SEM, EDX, and Optical microscope analysis. All coatings were applied successfully, and the most distinct defects occurred in the Ni-matrix coating. The hardness of the Ni matrix coating was the highest, however the wear resistance was the highest for the Zn matrix coating. The lowest hardness and wear resistance were measured in the Sn matrix coating. As a result of the bending test, distinct crack formations were observed in the Zn matrix coating, unlike the others.