MICROSTRUCTURE AND TENSILE PROPERTIES OF TIAL COMPOUNDS FORMED BY REACTIVE FOIL METALLURGY

TiAl-based intermetallic compounds were produced by reactive annealing and hot isostatic pressing of overlayed and rolled pure titanium and aluminium foils. Specimens produced by foil metallurgy had relatively low oxygen contents and a duplex layer structure. Tensile tests were p erformed between room temperature and 900 degrees C. An anomalous yiel d strength behaviour and elongation to rupture at room temperature up to 1% were found. The measured properties are discussed with respect t o the microstructure. Foil metallurgy is shown to be an attractive pro cessing technique for producing high quality titanium aluminides.