### Effects of solution heat treatment on the microstructure, oxidation, and mechanical properties of a cast Ni$_{3}$Al-based intermetallic alloyEffects of solution heat treatment on the microstructure, oxidation, and mechanical properties of a cast Ni$_{3}$Al-based intermetallic alloy

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 Author Lee, Dongyun Source SpringerLink Content type Text Publisher The Korean Institute of Metals and Materials File Format PDF Copyright Year ©2006 Language English
 Subject Domain (in DDC) Technology ♦ Engineering & allied operations Subject Keyword intermetallic alloys ♦ casting ♦ solution heat treatment ♦ oxidation ♦ mechanical properties ♦ Metallic Materials ♦ Operating Procedures, Materials Treatment ♦ Magnetism, Magnetic Materials ♦ Engineering Thermodynamics, Heat and Mass Transfer ♦ Characterization and Evaluation of Materials ♦ Continuum Mechanics and Mechanics of Materials Abstract Solution heat treatment is employed in an attempt to improve oxidation and mechanical properties of an as-cast Ni$_{3}$Al alloy (IC221M) at operation temperature, 900 °C. Solution heat treatment was hypothesized to have beneficial effects through dissolving γ Ni$_{5}$Zr eutectic into the matrix. The microstructures, oxidation behavior in air at 900 °C, and mechanical properties with aging times at 900 °C were examined after solution heat treatment of as-cast Ni$_{3}$Al alloy in Ar for up to 100 h at 1100 °C. The oxide penetration depth into the matrix was dramatically decreased and more homogeneous surface oxides were obtained relative to the no solution, treatment case. Hardness was improved by solution heat treatment due to a solid solution strengthening effect by Zr, but the tensile properties after solution heat treatment were not significantly different from those prior to treatment. ISSN 15989623 Age Range 18 to 22 years ♦ above 22 year Educational Use Research Education Level UG and PG Learning Resource Type Article Publisher Date 2006-01-01 Publisher Place Seoul Journal Metals and Materials Volume Number 12 Issue Number 2 Page Count 7 Starting Page 153 Ending Page 159

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