A Fundamental Study of P/M Processed Elevated Temperature Aluminum Alloys.
Annual technical rept. 1 Oct 82-30 Sep 83,
DREXEL UNIV PHILADELPHIA PA DEPT OF MATERIALS ENGINEERING
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Powder processed Al-Fe-Ni alloys containing FeNiAl9 dispersoids in the range 0.2-0.3 volume fraction are being examined with respect to processing mode, microstructure, microstructural stability and elevated temperature tensile and creep response. The overall objective is to establish a comprehensive and quantitative fundamental understanding of processing-microstructure relations in this new class of alloys in order to provide design guidelines with respect to service stresses and temperatures. To date, microstructural characterization, dispersoid stability, hot tensile and creep resistance have been characterized. These data and observations confirm the benefits of rapid solidification, promising levels of structural stability, and potential for long-time service at temperatures up to approx. 250 deg C 482 deg F. Using the L-S-W theory, it is possible to predict coarsening kinetics over a wide range of temperatures.
- Properties of Metals and Alloys