6、headvantageofgammaTiAl-basedalloysin lowdensity,specificmodulus,specifichightemperaturestrength,creepresistanceandoxidationresistancemakesthembecame oneofanewgenerationof hightemperaturestructuralmaterials used in aircraftengineand rocketpropulsion.Butthereasonofthe disadvantagesof roomtemperature b