STP651

    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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    Abstract

    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.

    Keywords:

    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.


    Paper ID: STP26543S

    Committee/Subcommittee: E08.07

    DOI: 10.1520/STP26543S


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