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Thermal vacancies and the yield anomaly of FeAl |
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| Authors: | E. P. George I. Baker |
| Affiliation: | a Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6093, USA b Thayer School of Engineering, Dartmouth College, Hanover, NH 03755-8000, USA |
| Abstract: | We review here the George-Baker model for the yield strength anomaly of FeAl which is based on hardening by thermal vacancies at intermediate temperatures and dislocation creep at high temperatures. Results of up-quenching and down-quenching experiments, which corroborate the vacancy hardening mechanism, are discussed. Some implications of the model are compared with available experimental results. |
| Keywords: | A. iron aluminides based on FeAl B. creep mechanical properties at high temperature yield stress C. defects: point defects D. mechanical properties theory |
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