Title

Precipitation hardening of supersaturated Al–Sc–Zr produced via melt-spinning

Authors

Yang Yang, Michigan Technological UniversityFollow
Paul G. Sanders, Michigan Technological UniversityFollow

Document Type

Conference Paper/Presentation

Publication Date

2-27-2019

Abstract

Al–Sc–Zr alloys have the potential for elevated-temperature strength resulting from thermally-stable L1₂ precipitates. However, low solubilities of Sc and Zr limit precipitate volume fractions, enabling dislocation bypass via climb. One method to increase precipitate volume fraction involves using rapid cooling techniques to increase supersaturation. Rapid cooling utilizing melt spinning (10⁷ k/s) can increase solute supersaturation by a factor of ~8 from Al–0.06Sc–0.06Zr at.% to Al–0.5Sc–0.4Zr at.%. Melt-spun ribbon underwent isochronal heat treatment. The ambient temperature hardness of peak-aged ribbon increased over the aged Al–0.06Sc–0.06Zr at.% by 450 MPa (67%).

Publisher's Statement

© The Minerals, Metals & Materials Society 2019. Publisher's version of record: https://doi.org/10.1007/978-3-030-05861-6_135

Publication Title

TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings

Recommended Citation

Yang, Y., & Sanders, P. G. (2019). Precipitation hardening of supersaturated Al–Sc–Zr produced via melt-spinning. TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings, 1421-1426. http://doi.org/10.1007/978-3-030-05861-6_135
Retrieved from: https://digitalcommons.mtu.edu/materials_fp/204