Heat-resistant titanium-aluminium alloy with a high fracture toughness at room temperature and with good oxidation resistance and strength at high temperatures

摘要

A heat-resistant TiAl alloy excellent in a room-temperature fracture toughness, a high-­temperature oxidation resistance and a high-­temperature strength, consisting essentially of:aluminum : from 29 to 35 wt.%,niobium : from 0.5 to 20 wt.%,at least one element selected from the group consisting of:silicon : from 0.1 to 1.8 wt.%,andzirconium : from 0.3 to 5.5 wt.%,andthe balance being titanium and incidental impurities.