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Researcher

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Karin Ahmed, Ph.D.

Postoctoral Research Associate

Research Areas:

Biography:
Dr. Karim Ahmed is a postdoctoral research associate who has extensively studied the effect of radiation on irradiated materials. As a research assistant at Purdue University in Indiana, he was part of a team that preformed the first 3D simulations of grain growth in porous ceramics and helped present a systemic approach to construct phase field (diffuse-interface) models of microstructure evolution in irradiated materials. This work was supported by the Center for Materials Science of Nuclear Fuel, an Energy Frontier Research Center funded by the U.S. Department of Energy, the Office of Sciences and Office of Basic Energy Sciences. As a teaching assistant at Purdue’s School of Nuclear Engineering, Dr. Ahmed helped students develop an understanding of the mechanisms of radiation damage and the microstructural evolution process that lead to drastic changes on the physical properties of materials. Since arriving at INL in February of 2015 as a research intern, he has worked in the Fuel Modeling and Simulation Department and is currently investigating irradiation effects on the performance of nuclear fuels and structural materials using the mesoscale simulator MARMOT. Dr. Ahmed is a member of the Materials Research Society (MRS) and Minerals, Metals and Materials Society (TMS).

Digital Profiles:
Education:

​Ph.D., Nuclear Engineering - Purdue University

M.S., Materials Science - Florida State University

B.S., Nuclear Engineering - Alexandria University, Egypt

 

Affiliations:

Materials Research Society (MRS)

The Minerals, Metals and Materials Society (TMS)

Publications:

K. Ahmed and A. El-Azab, “On two classes of phase field models for void growth and coarsening in irradiated crystalline solids” submitted to Physical Review E.

 

K. Ahmed , T. Allen, and A. El-Azab, “phase field modeling for grain growth in porous solids” Journal of Materials Science (2015) DOI 10.1007/s10853-015-9107-9 .

 

A. El-Azab, K. Ahmed, S. Rokkam,  and T. Hochrainer, “Diffuse interface modeling of void growth in irradiated materials. Mathematical, thermodynamic and atomistic perspectives”, Current Opinion in Solid State and Materials Science 18, 90, 2014.

 

K. Ahmed, J. Pakarinen, T. Allen, and A. El-Azab, “Phase field simulation of grain growth in porous uranium dioxide”, Journal of Nuclear Materials 446, 90, 2014.

 

K. Ahmed,  C. Yablinsky,  A. Schulte, T. Allen and A. El-Azab,  “Phase field modeling of the effect of porosity on grain growth kinetics in polycrystalline ceramics”, Modelling and Simulation in Materials Science Engineering , 21, 065005, 2013.

 

K. Ahmed, J. Deng and A. El-Azab, “Computational Modeling of the Sintering Process in Thermal Barrier Coating Systems “, In the  Proceedings of The Fifth International Conference on Multiscale Materials Modeling MMM 2010.

 

K. Ahmed, J. Deng and A. El-Azab, “Computational Modeling of Microstructure Evolution in Thermal Barrier Coating Systems “, In the Proceedings of FCAAP Annual Technical Symposium, Advanced Materials & Structures  Section (paper number 2, pp. 16).2010.

 

J. Deng, K. Ahmed and A. El-Azab, “Phase Field Simulation of Sintering of Thermal Barrier Coatings,” In the  Proceedings of FCAAP Annual Technical Symposium , Advanced Materials Section (paper number 1, pp. 1-6). 2009.

 

 

Presentations:

Karim Ahmed, Michael Tonks, Yongfeng Zhang, Todd Allen and Anter El-Azab, “ 3D phase field simulation of grain growth in porous uranium dioxide” TMS, 2016, Nashville, TN.

 

Karim Ahmed, Michael Tonks, Yongfeng Zhang, Todd Allen and Anter El-Azab, “phase field modeling of grain growth in porous polycrystalline solids” MRS, 2015, Boston, MA.

 

Karim Ahmed, Anter El-Azab, Srujan Rokkam, and Thomas Hochrainer, “ Asymptotic matching of diffuse- and sharp- interface models of void growth in irradiated solids” Seventh International Conference on Multiscale Materials Modeling, 2014, Berkeley, CA.

 

Karim Ahmed, Anter El-Azab, Srujan Rokkam, and Thomas Hochrainer, “ Diffuse interfacemodeling of void growth in irradiated materials” Third International Symposium on Phase Field Method, 2014, State College, PA.

 

Karim Ahmed and Anter El-Azab, “Computational modeling of grain growth in porous uranium dioxide” TMS, 2013, San Antonio, TX.

 

Karim Ahmed and Anter El-Azab, “phase field modeling of grain growth in porous ceria” MRS, 2012, Boston, MA.

 

Karim Ahmed, Srujan Rokkam, and Anter El-Azab, “Stress effects on void growth in irradiated metals” TMS, 2012, Orlando, FL.

 

Karim Ahmed, Jie Deng  and Anter El-Azab, “Computational Modeling of Microstructure Evolution in Thermal Barrier Coating Systems “, in Advanced Materials & Structures. Florida Center For Advanced Aero-Propulsion (FCAAP), 2010, Tallahassee, FL.

 

Jie Deng , Karim Ahmed, and Anter El-Azab, “Phase Field Modeling of Sintering in Thermal Barrier Coating Systems “, in Advanced Materials & Structures. Florida Center For Advanced Aero-Propulsion (FCAAP), 2009, Tallahassee, FL.

Version: 2.0
Created at 7/13/2016 2:49 PM by Phyllis L. King
Last modified at 8/15/2016 2:25 PM by David S. Marwil