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Nitrogen solubility and nitride formation in austenitic Fe-Ti alloys

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Abstract

The equilibrium nitrogen solubility and nitride formation in austenitic Fe and Fe-Ti alloys were measured in the temperature range from 1273 to 1563 K. Specimens 0.5 mm thick were equilibrated with four different nitrogen-argon gas mixtures containing 1 pct hydrogen. The nitrogen solubility in austenitic iron obeys Sieverts' law. The equilibrium nitrogen content was determined to be log (wt pct N)γ-Fe, PN2=1 atm = (539 ± 17)/T − (2.00 ± 0.01). The precipitated titanium nitride was identified as cubic TiN, and the solubility product was determined to be log(wt pct Ti) (wt pct N) = −14,400/T + 4.94.

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Authors and Affiliations

  1. Department of Materials and Metallurgical Engineering, The University of Michigan, 48109, Ann Arbor, MI

    Harue Wada (Associate Research Scientist) & Robert D. Pehlke (Professor)

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  1. Harue Wada
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  2. Robert D. Pehlke
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Wada, H., Pehlke, R.D. Nitrogen solubility and nitride formation in austenitic Fe-Ti alloys. Metall Trans B 16, 815–822 (1985). https://doi.org/10.1007/BF02667518

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  • DOI: https://doi.org/10.1007/BF02667518

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