Abstract
The aeroengine and airframe applications of titanium alloys are often limited by their insufficient oxidation resistance to the aggressive environment at higher temperatures. A high temperature oxidation resistant titanium alloy (Arconic-THORTM) has been developed. This alloy is an alpha-beta alloy with superior oxidation resistance and improved creep resistance. The oxidation weight gain of Arconic-THORTM is much lower than Ti-6242 and Beta 21s in the temperature range up to 750˚C. The room and elevated temperature properties of Arconic-THORTM are comparable to those for Ti-6242. Arconic-THORTM also shows superior, post-thermal-exposure tensile strength, ductility, and fatigue properties, and is capable of being cold formed, hot formed, and superplastic formed, welded and heat treated to different product geometries. The microstructures and mechanical properties for sheet manufactured from the production ingots are presented and discussed in this study.
Highlights
Titanium alloys are widely used as aeroengine and airframe structural components, due to their low density, good corrosion behavior, and excellent mechanical properties
Demands for higher performance and fuel efficiency are leading to the development of aero-engine and airframe components that must operate at increased temperatures and decreased weight compared to legacy alloys
These higher performance targets have led to a continuing need for titanium alloys with excellent oxidation resistance and high strength at elevated temperatures up to 750°C
Summary
Titanium alloys are widely used as aeroengine and airframe structural components, due to their low density, good corrosion behavior, and excellent mechanical properties. The mechanical properties such as tensile properties at room and elevated temperatures, and high cycle fatigue properties of the Arconic-THORTM production ingot discussed in this study. Mechanical properties of the Arconic-THORTM sheets (1 and 2 mm thick) were evaluated using room and elevated-temperature tensile testing.
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