Abstract
The predominant crystallographic relations between dynamic recrystallization (DRX) nuclei and simple deformation structures have been characterized in aluminum single crystals (ASCs) of Cube{001} < 100 > and S{123} < 634 > orientations. The ASCs were uniaxial compression at different temperatures (25, 300 ℃) and strain rates (0.001, 10 s−1). The deformed ASCs were analyzed using electron backscattered diffraction (EBSD) and electron channeling contrast imaging (ECCI). Local orientation measurements implied that Cube-oriented ASCs are dominated by a group of microbands, while DRXs in S-oriented ASCs are significant. There are few discontinuous dynamic recrystallized (DDRX) grains in Cube-oriented ASCs, while DDRX grains in S-oriented ASC reach a millimeter level at 25 ℃/10 s−1. Many continuous dynamic recrystallized (CDRX) grains and sub-grain structures are observed in S-oriented ASCs at 300 ℃/10 s−1. Misorientation angles across the DRX interfaces are grouped in the range of 20–50° (with a maximum at 30–40°). The diverse distribution of slip systems and stress-axis orientations in differently oriented ASCs contributes to the difference in the initial slip system, misorientation accumulation and DRX behavior.
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Chen, Y.Q., Xu, J.B., He, Z.M., Pan, S.P., Liu, W.H., Song, Y.F. (2024). Effect of Initial Orientation on Microstructural Evolution of Aluminum Single Crystals During Hot Deformation. In: Mocellin, K., Bouchard, PO., Bigot, R., Balan, T. (eds) Proceedings of the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity. ICTP 2023. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-031-41341-4_65
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DOI: https://doi.org/10.1007/978-3-031-41341-4_65
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