Abstract
The recrystallization of AA 7010 alloys (Al-6 pct Zn-2.4 pct Mg-1.6 pct Cu-Zr) during solution treatment is investigated as a function of Zr content after deformation under conditions simulating hot rolling. The respective roles of the volume fraction and size of Al3Zr dispersoids are characterized by additions of 0.05 to 0.12 pct Zr and suitable heat treatments. Plane strain compression (channeldie) tests at temperatures of 320 °C and 440 °C were conducted to strains of 1, and the samples subsequently solution-annealed at 470 °C. Recrystallization during this anneal was characterized by optical and electron microscopy and X-ray diffraction. The fraction recrystallized decreases with increasing Zr content, higher deformation temperature, and finer particle size. An original model based on the concept of the recrystallizable volume fraction is presented to predict the degree of recrystallization in materials characterized by spatially heterogeneous microstructures.
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Morere, B., Shahani, R., Maurice, C. et al. The influence of Al3Zr dispersoids on the recrystallization of hot-deformed AA 7010 alloys. Metall Mater Trans A 32, 625–632 (2001). https://doi.org/10.1007/s11661-001-0079-9
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DOI: https://doi.org/10.1007/s11661-001-0079-9