High Temperature Melt Point Ductile Metallic Fiber Toughening of γ-Type Titanium Aluminide Intermetallics

摘要

The test results may be summarized as follows; (1) Fracture toughness for γ-TiAl was remarkably mproved by high temperature melting point ductile metallic fibers, commercially available tungsten and tungsten-rhenium W, W-3%Re and W-25%Re. (2) Fracture toughness for W, W-Re/γ-TiAl is superior to Nb ductile phase reinforced titanium aluminide intermetallic matrix composite Nb/γ-TiAl. (3) Fracture toughness are successfully predicted for continuous high temperature melting point ductile metallic fibers reinforced γ-type titanium aluminide intermetallics composites on the basis of the concept of ductile metallic phase toughening mechanism.