Development of low-cost high-strength Ti-Fe-O-N alloy series

Alloy design of low-cost high-strength Ti-Fe-O-N alloy series and their materials properties were described. The alloy series do not contain any expensive elements and have high tensile strength ranging from 700 to 1,000MPa as well as high ductility and excellent hot workability. Their corrosion resistance and weldability are also excellent and the alloy series seem to be suitable for the applications used at temperatures not far from room temperature. On the other hand, some attention should be paid to decrease of strength and change of their properties during long term usage when the alloys are used at intermediate temperature. The Ti-Fe-O-N alloy series are the core alloy series in the newly developed "Super-TIX series" together with the Ti-Fe-Al alloy series and the application of those alloys to various fields are now ongoing.