About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
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Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
Microstructural and Mechanical Characterization of a Concentrated FCC CrCoNi Matrix Containing Dispersed L12 Precipitates |
Author(s) |
Diego de Araujo, Fransciso Gil Coury, Claudio Shyinti Kiminami |
On-Site Speaker (Planned) |
Diego de Araujo |
Abstract Scope |
The ternary CrCoNi alloy presents a good combination of strength, toughness, and corrosion resistance, as showed by different studies in the last years. In this work, we report the microstructural and mechanical behavior of Cr29.7Co29.7Ni35.4Al4.0Ti1.2 (at. %) alloy, which was designed to present dispersed nanometric L12 precipitates in a Cr-Co-Ni matrix. The aimed microstructure was successfully achieved, experimentally determined precipitates volume fraction and the solvus temperature showed a good agreement with CALPHAD calculations. Aging treatments were performed at 850 °C for different amounts of time up to 166 h. The uniformly distributed spherical precipitates had a coarsening rate constant lower than those of different γ/γ' alloys reported in the literature. The σ0.2% yield strength gain upon aging was analyzed based on conventional precipitation hardening models. The values are compared to those obtained in some traditional wrought superalloys. |
Proceedings Inclusion? |
Undecided |