Influence of Test Temperature on the Fracture Toughness and Tensile Properties of Ti-8Mo-8V-2Fe-3A1 and Ti-6A1-6V-2Sn Alloys Heat Treated to High Strength Levels

    Published: Jan 1978

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    This paper examines the mechanical properties of two high strength titanium alloys as a function of test temperature, namely, the α/β titanium alloy Ti-6A1-6V-2Sn (Ti-662) as well as the metastable β-alloy Ti-8Mo-8V-2Fe-3A1 (Ti-8823). Specifically, the paper characterizes the changes in fracture toughness and tensile properties at low and elevated test temperatures. The variation in fracture toughness is given by KQ and W/A, while for the tensile properties, it is given by the yield and ultimate tensile strength, reduction of area, and elongation. For Ti-8823 material, the characterization was conducted on material that was given either a solution treated-and-aged or an age treatment directly after fabrication. Heat treatments for the Ti-662 alloy were either a solution-treated-and-age or solution-treated-and-overaged. Results are discussed in terms of fractographs taken from broken fracture toughness and tension specimens.


    titanium, titanium alloys, mechanical properties, tensile properties, fracture toughness, fractography, low temperature tests, elevated temperature tests

    Author Information:

    Chait, R
    Army Materials and Mechanics Research CenterAIRCO, Inc., Watertown, Mass.N. J.

    Lum, PT
    Army Materials and Mechanics Research CenterAIRCO, Inc., Watertown, Mass.N. J.

    Committee/Subcommittee: E08.07

    DOI: 10.1520/STP26543S

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