November 1, 2025Journal of Materials Research and TechnologyOpen Access

Hot deformation of B4C/Al composites: Mechanical behavior analysis and microstructural evolution

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Dynamic recrystallization improved with higher strain rates, enhancing mechanical properties of B4C/Al composites. The optimized back-propagation neural network provided flow stress predictions with an R2 value of 0.996. Hot deformation behavior of a 15 wt% B4C/7093Al composite was analyzed using powder metallurgy methods. Zener pinning effect from B4C particles inhibited grain growth, supporting refined grain size and texture evolution.
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Hot deformation of aluminum composites is key for manufacturing stronger materials. This study shows that adding B4C helps control grain size and improve strength during hot processing. This is important because it can lead to better products in industries that use aluminum. 🛠️
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Implication

This work demonstrates dynamic recrystallization and flow stress analysis in B4C/Al composites, suggesting optimized hot deformation strategies.

Abstract

In this study, a 15 wt% B4C/7093Al composite was fabricated via powder metallurgy, and its hot deformation behavior and microstructural evolution were systematically investigated at temperatures ranging from 300 °C to 500 °C and strain rates between 0.001s−1 and 10 s−1. The composite exhibited pronounced sensitivity to both temperature and strain rate. At a given temperature, dynamic recovery dominated at lower strain rates, while dynamic recrystallization was markedly enhanced at higher rates. A back-propagation neural network optimized using the Sparrow Search Algorithm (SSA–BP) was established and demonstrated excellent predictive accuracy for flow stress (R2 = 0.996). Electron backscatter diffraction (EBSD) analysis revealed a distinct transition from recovery-dominated to recrystallization-dominated mechanisms with increasing temperature. The B4C particles exerted a dual regulatory effect—promoting recrystallization through particle-stimulated nucleation (PSN) while simultaneously inhibiting grain growth via the Zener pinning effect—resulting in a refined grain size range of 2.07–7.58 μm. Furthermore, the incorporation of B4C significantly weakened texture intensity (f(g) < 2.5), leading to a more randomized orientation distribution. Transmission electron microscopy (TEM) characterization confirmed the dynamic precipitation of η' (Al4Mg2Zn3, AlZnMgCu) and η (MgZn2) phases during deformation. These findings provide a scientific basis for optimizing hot working parameters and establish a solid theoretical foundation for the industrial application of B4C-reinforced aluminum matrix composites.

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Cite This Study

Wu et al. (2025) studied this question.

synapsesocial.com/papers/69254377c0ce034ddc358b42 https://doi.org/10.1016/j.jmrt.2025.11.088

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Implication

This work demonstrates dynamic recrystallization and flow stress analysis in B4C/Al composites, suggesting optimized hot deformation strategies.

Hot deformation of B4C/Al composites: Mechanical behavior analysis and microstructural evolution

Key Points

Implication

Abstract

Discussion

Cite This Study

Hot deformation of B4C/Al composites: Mechanical behavior analysis and microstructural evolution

Key Points

Implication

Abstract

Discussion

Cite This Study

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