Abstract
A pulsed current hot pressing (PCHP) technique was used to prepare Ti/Ti-aluminides laminate composites. Microstructure of the composite produced was an alternatively-laminated structure composed of Ti and Ti-aluminides. Tensile tests carried out for the composites at room temperature revealed that the mechanical properties of the composites changed by altering the thickness of the Al foils used. The tensile strength and the elongation of the composite produced from 0.04-mm-thick Ti and 0.012-mm-thick Al foils attained to about 700MPa and 3.5%, respectively. These mechanical properties of the composite produced by PCHP were higher than those by conventional vacuum hot pressing techniques. Microstructural observations of fractured specimens showed that the Ti layers effectively bridged numerous cracks occurred in the Ti-aluminides.
