AP-FIM STUDY ON THE MICROSTRUCTURES OF TiAl INTERMETALLIC COMPOUNDS FXBRICATED BY INGOT METALLURGY AND CENTRIFUGAL SPRAY DEPOSITION
AP-FIM STUDY ON THE MICROSTRUCTURES OF TiAlINTERMETALLIC COMPOUNDS FXBRICATED BY INGOTMETALLURGY AND CENTRIFUGAL SPRAY DEPOSITION

1. IntroductionTitanium aluminide alloys based on the ac-TiAl phase are attractive materials for hightemperature structural application. The strength and ductility of two-phase TiAl alloys aremainly decided on microstructural size and morphologiesll32]. The mechanical propertiesof ac--TiAl alloys can be widely changed by microstructural control with millor alloyingand processing. It will be seen that an advanced processing, centrifugal spray deposition(CSD), can offer alloys with a refined…