Farghalli A. Mohamed

Professor, Chemical Engineering & Materials Science
The Henry Samueli School of Engineering

PH.D., University of California, Berkeley

Phone: (949) 824-5807
Fax: (949) 824-2541
Email: famohame@uci.edu

University of California, Irvine
744J Engineering Tower
Mail Code: 2575
Irvine, CA 92697
Research Interests
Mechanical Properties, Creep, Superplasticity, Correlations Between Property and Microstructure
Research Abstract
High-Temperature Deformation of Materials
Investigator: F.A. Mohamed
Research Associate: K. Park

The high-temperature deformation of metals and solid-solution alloys is being investigated, using stress-reduction experiments and other techniques, in order to provide insight into the nature and origin of the rate controlling creep mechanisms. The information gained from this investigation will be used to (1) devise predictive models for high- temperature strengthening in terms of microstructural deformation mechanisms and (2) modify the microstructures of engineering materials, for the purpose of improving creep resistance.

Superplastic Flow and Cavitation
Investigators: F.A. Mohamed and J.C. Earthman
Research Associate: K. Park
Research Assistants: Q. Duang, S. Hu, and S. Yang
Support: National Science Foundation

The primary objective is to examine the hypothesis that the characteristics of superplastic flow at low stresses are a consequence of impurity atom segregation at boundaries. The experimental approach involves a detailed examination of the effect of selected impurity elements on creep characteristics, plastic instability, boundary sliding, and microstructure in superplastic alloys, over wide ranges of experimental conditions (stress, temperature, and grain size). The research also will include an in-depth study of impurity effects on cavitation processes. In this study, cavity nucleation and the relationships between deformation and cavity growth will be investigated closely.
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