Farshad Rahimi
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Farshad Rahimi has a total of 4 co-authors. Here are the top co-authors by number of shared publications:
- Alex Meisami
Judd Leighton Schools of Business and Economics, Indiana University South Bend, South Bend, IN 46634, USA
1 shared publication - Amirhossein Meysami
Department of Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, USA
1 shared publication - Mohammad Meysami
Department of Mathematics, The University of Tulsa, Tulsa, OK 74104, USA
1 shared publication - Sayyed Erfan Aghili
Materials Engineering Group, Golpayegan College of Engineering, Isfahan University of Technology, Golpayegan, Iran
1 shared publication
Latest Publications
- Open Access
Microstructure and Strength of Yttria-Reinforced Aluminum by ARB
The effects of accumulative roll bonding (ARB) on the microstructure and mechanical properties of an AA 1060/Y2O3 nanocomposite are investigated. AA 1060 alloy sheets that had been pre-rolled to a thickness of 1 mm were annealed at 430 °C, stacked with Y2O3 nanoparticles, and roll-bonded with a 50% thickness reduction per pass up to five passes. FESEM images, tensile testing (ASTM E8), and Vickers hardness measurements were used to characterize the material. With an increasing number of ARB passes, the dispersion of the Y2O3 particles within the AA 1060 sheets improved, as indicated by the increasing value of the dispersion index D (from 0.35 at pass 1 to 0.81 at pass 5); the ultimate tensile strength of the nanocomposite sheets increased from 77.5 MPa for the as-annealed sheets to 187 MPa for the sheets after five passes of roll bonding, and the hardness of the sheets reached 57.5 HV after five passes of roll bonding (≈2.4× the hardness of the annealed sheets). Furthermore, the elongation of the nanocomposite sheets decreased sharply after the first pass of roll bonding but then stabilized between 3.5 and 5%. A physics-guided saturation model is fitted to the measured UTS data, and leave-one-out cross-validation is used to assess its limited predictive capability.
Open AccessMicrostructure and Strength of Yttria-Reinforced Aluminum by ARB
The effects of accumulative roll bonding (ARB) on the microstructure and mechanical properties of an AA 1060/Y2O3 nanocomposite are investigated. AA 1060 alloy sheets that had been pre-rolled to a thickness of 1 mm were annealed at 430 °C, stacked with Y2O3 nanoparticles, and roll-bonded with a 50% thickness reduction per pass up to five passes. FESEM images, tensile testing (ASTM E8), and Vickers hardness measurements were used to characterize the material. With an increasing number of ARB passes, the dispersion of the Y2O3 particles within the AA 1060 sheets improved, as indicated by the increasing value of the dispersion index D (from 0.35 at pass 1 to 0.81 at pass 5); the ultimate tensile strength of the nanocomposite sheets increased from 77.5 MPa for the as-annealed sheets to 187 MPa for the sheets after five passes of roll bonding, and the hardness of the sheets reached 57.5 HV after five passes of roll bonding (≈2.4× the hardness of the annealed sheets). Furthermore, the elongation of the nanocomposite sheets decreased sharply after the first pass of roll bonding but then stabilized between 3.5 and 5%. A physics-guided saturation model is fitted to the measured UTS data, and leave-one-out cross-validation is used to assess its limited predictive capability.