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The effect of hydrogen as a temporary alloying element on the microstructure and tensile properties of Ti-6Al-4V

  • Mechanical Behavior
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Abstract

Ti-6Al-4V alloy, to which 0.6 wt pct to 1.0 wt pct (22 to 33 at. pct) hydrogen has been added, can undergo a phase transformation which produces unique, fine microstructures. Specimens of the alloy were heated to 870°C, transformed at temperatures between 540°C and 700°C, and the microstructures were determined as a function of hydrogen content and transformation temperature. Microstructures and tensile properties of sheet specimens were determined after such transformation followed by dehydrogenation at temperatures between 650°C and 760°C. The highest yield strength (1130 MPa) and good ductility (9 pct El) were associated with a fine equiaxed microstructure obtained in material charged with approximately 1.0 wt pct hydrogen, transformed at 565°C and dehydrogenated at 675°C. Lower strengths and ductilities were associated with acicular microstructures produced by transformation at higher temperatures or coarser structures producted at higher dehydrogenation temperatures.

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Authors and Affiliations

  1. High Temperature Meterials Branch, Metals and Ceramics Division, Air Force Wright Aeronautical Laboratories/Materials Laboratory, 45433, Wright-Patterson Air Force Base, OH

    William R. Kerr (Metallurgist)

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  1. William R. Kerr
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Kerr, W.R. The effect of hydrogen as a temporary alloying element on the microstructure and tensile properties of Ti-6Al-4V. Metall Trans A 16, 1077–1087 (1985). https://doi.org/10.1007/BF02811677

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  • DOI: https://doi.org/10.1007/BF02811677

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