Abstract
Torsion tests, on a 2014 + 0.13Zr alloy, were performed at temperatures in the range 573 to 773 K under strain rates ranging from 10−3 to 10 s−1. Transmission electron microscopy (TEM) inspection was performed in order to establish the role of the hot deformation on the hardening second-phase particles. The pinning effect of Al3Zr particles was also investigated. At the testing temperatures, the Al3Zr particles were stable, and no significant statistic changes, in terms of density and mean size, occurred during the tests. Small Al3Zr dispersoid particles inhibit recrystallization by pinning the grain and subgrain boundaries during hot deformation. Yet, they are particularly resistant to dislocation shear microstructure mechanism. Grains were elongated and contained a large number of sub-grains a few microns in width.
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Cabibbo, M., Spigarelli, S. & Evangelista, E. Microstructural characterization of secondary-phase particles in a hot-deformed Al-Cu-Mg-Zr alloy. Metall Mater Trans A 35, 293–300 (2004). https://doi.org/10.1007/s11661-004-0130-8
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DOI: https://doi.org/10.1007/s11661-004-0130-8