Microstructure and Creep Properties of TiAl-Ti(sub 3)Al In-Situ Composites

摘要

Objectives of the report are: Exploit thermomechanical-processing techniques to fabricate TiAl/Ti3Al in-situ laminate composites with the size of lamella width down to submicron or nanometer length-scales; Characterize microstructure and elevated-temperature creep resistance of the in-situ composites; Investigate the fundamental interrelationships among microstructures, alloying additions, and mechanical properties of the in-situ composites so as to achieve the desired properties of the in-situ composites for high-temperature structural applications.