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Your search keyword '"Al-Mufadi, Fahad A."' showing total 123 results
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123 results on '"Al-Mufadi, Fahad A."'

4. Shore Hardness Characterization of FDM Printed PLA/Epoxy/MGFs Composite Material Structure

Author

Mustafa, Ammar, Aloyaydi, Bandar, Sivasankaran, Subbarayan, Al-Mufadi, Fahad A., Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, di Mare, Francesca, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, Dave, Harshit K., editor, Dixit, Uday Shanker, editor, and Nedelcu, Dumitru, editor

Published
2022
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24. Influence of Strain Rate and Percentage of Cold Work on Room-Temperature Deformation Behaviour of AISI 1015 Carbon Steel: Detailed Microstructures and Cold Workability Map Investigations

Author

Sivasankaran, S. and Al-Mufadi, Fahad

Abstract

AISI 1015 low-carbon steel is being frequently applied in various steel industries, especially in the processing of parts by cold-forged, cold-headed and/or cold-formed machine tool parts. In this paper, the uniaxial compression test was conducted on AISI 1015 steel by varying the amount of percentage of cold work (PCW) and the strain rates (SRs). The PCW was varied from 15 to 65%, whereas the SR was increased from 1 × 10−4to 1 × 10−1s−1with a step of 1000 times. The microstructural analyses of as-received and cold-deformed samples were carried out using various electron microscopes. The as-received microstructure revealed the presence of coarse α-ferrite and fine pearlite grains. Based on the process parameters, a cold workability map was developed and investigated by which the safe cold work parameters could be selected. The cold-deformed results through electron backscattered diffraction were explained. More elongated deformed grains (a fibre texture) were observed at low SR. A highly stressed equiaxed grain (spread texture) was obtained at a very high SR due to strain incompatibility. Finally, the work hardening behaviour was investigated as a function of SR for 65% cold-worked samples.

Published
2024
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27. Erosion Corrosion Behavior of Nanostructure Commercial Pure Titanium in Simulated Body Fluid

Author

Djavanroodi F., Irfan Osama M., and Al-Mufadi Fahad A.

Subjects
Engineering (General). Civil engineering (General), TA1-2040
Abstract

To date, ECAP technique have been successfully employed to produce Ultra-fine/Nanostructure grain materials, but some materials such as hexagonal closed-packed (HCP) alloys are difficult to process by ECAP at room temperature. In this work, Transmission Electron Microscopy (TEM), Vickers hardness test and Torsion test were employed to confirm the attainment of ultrafine/nanostructured grain (UFG/NSG) commercial pure titanium (CP-Ti) Titanium fabricated by ECAP as a sever plastic deformation process. The samples were pressed by ECAP (route BC) up to four passes at elevated temperature (400° C). Finally, the Erosion-Corrosion (E-C) behavior of ultrafine/nanostructured grain (UFG/NSG) Titanium in a simulated body fluid were investigated through weight loss measurement.

Published
2019
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31. Continuous hot-compaction behavior of nanostructured FeCrCuMnTi-(V, Zn) high-entropy alloys

Author

Sivasankaran, S., Ammar, Hany R., and Al-Mufadi, Fahad A.

Abstract

In this work, the continuous hot-compaction behavior of Quinary-FeCrCuMnTi, Senary-FeCrCuMnTiV, and Septenary-FeCrCuMnTiVZn equiatomic nanostructured high-entropy alloys (HEAs) was studied from 0 to 550 MPa pressure in a universal testing machine. These alloys were synthesized by mechanical alloying and characterized by HRSEM and HRTEM. The synthesized powders were compacted at different temperatures (RT to 525°C) using a universal testing machine operated at 10 mm per minute. Microstructural results demonstrated that multiphase solid solutions were obtained in all the HEAs. Septenary-FeCrCuMnTiVZn HEA has produced a higher amount of FCC phase compared to other alloys due to the incorporation of low melting Zn atoms enhancing solid solutions leading to produce a lower value of FCC phase crystallite size (7.8 nm). The continuous hot-compaction results explained that the percentage relative density was increased drastically after 225°C due to the elimination of internal stress, and decreased dislocation density. Senary-FeCrCuMnTiV HEA exhibited a higher percentage of relative density in all operating conditions due to more crystallite size, lower value of powder particle sizes, and the domination of BCC-V atoms in addition to high-configurational entropy. The experimental relative density-pressure data were fitted linearly using the Panelli and Ambrozio Filho equation for exploring the plastic deformation ability of developed powder particles.

Published
2021
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32. Continuous hot-compaction behavior of nanostructured FeCrCuMnTi-(V, Zn) high-entropy alloys.

Author

Sivasankaran, S., Ammar, Hany R., and Al-Mufadi, Fahad A.

Subjects
FACE centered cubic structure, ALLOYS, MECHANICAL alloying, SPECIFIC gravity, DISLOCATION density, SOLID solutions, MATERIAL plasticity
Abstract

In this work, the continuous hot-compaction behavior of Quinary-FeCrCuMnTi, Senary-FeCrCuMnTiV, and Septenary-FeCrCuMnTiVZn equiatomic nanostructured high-entropy alloys (HEAs) was studied from 0 to 550 MPa pressure in a universal testing machine. These alloys were synthesized by mechanical alloying and characterized by HRSEM and HRTEM. The synthesized powders were compacted at different temperatures (RT to 525°C) using a universal testing machine operated at 10 mm per minute. Microstructural results demonstrated that multiphase solid solutions were obtained in all the HEAs. Septenary-FeCrCuMnTiVZn HEA has produced a higher amount of FCC phase compared to other alloys due to the incorporation of low melting Zn atoms enhancing solid solutions leading to produce a lower value of FCC phase crystallite size (7.8 nm). The continuous hot-compaction results explained that the percentage relative density was increased drastically after 225°C due to the elimination of internal stress, and decreased dislocation density. Senary-FeCrCuMnTiV HEA exhibited a higher percentage of relative density in all operating conditions due to more crystallite size, lower value of powder particle sizes, and the domination of BCC-V atoms in addition to high-configurational entropy. The experimental relative density-pressure data were fitted linearly using the Panelli and Ambrozio Filho equation for exploring the plastic deformation ability of developed powder particles. [ABSTRACT FROM AUTHOR]

Published
2022
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