Effects of precipitates on recrystallization of Al–Mg–Si alloy during hot deformation and sub-grain rotation behavior in dynamic recrystallization

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-09-12 DOI:10.1016/j.jmrt.2025.09.094

Peng Sun , Rensong Huang , Li Wan , Shanju Zheng , Yonghua Duan , Mengnie Li

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引用次数: 0

Abstract

Dynamic recrystallization (DRX) is one of the most significant microstructural features during thermal deformation. However, systematic studies on the microstructural evolution during its nucleation remain insufficient. In this work, the influence of Mg₂Si precipitates on recrystallization in Al–Mg–Si alloy during hot deformation was investigated, and the sub-grain rotation behaviors associated with different DRX nucleation mechanisms were further characterized. Results show that Mg₂Si formed under deformation conditions of 450 °C/0.001 s⁻¹ promotes recrystallization. Continuous DRX (CDRX) grains originating within grain interiors and at grain boundaries exhibit opposite lattice rotation directions, whereas geometric DRX (GDRX) grains display random rotation orientations. Discontinuous DRX (DDRX) occurs without lattice rotation, being governed primarily by grain boundary migration. Notably, CDRX nucleation requires a greater sub-grain rotation angle than GDRX. This work presents the first detailed examination of the effects of cubic Mg₂Si precipitates on recrystallization and provides a systematic characterization of sub-grain rotation behaviors in CDRX and GDRX, offering new insights into the thermal deformation mechanisms of Al–Mg–Si alloys.

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析出相对Al-Mg-Si合金热变形再结晶及动态再结晶亚晶粒旋转行为的影响

动态再结晶（DRX）是热变形过程中最重要的组织特征之一。然而，对其成核过程中微观组织演变的系统研究仍然不足。本文研究了Mg2Si析出物对Al-Mg-Si合金热变形过程中再结晶的影响，并进一步表征了不同DRX成核机制下的亚晶旋转行为。结果表明，在450℃/0.001 s−1的变形条件下形成的Mg2Si有利于再结晶。源自晶粒内部和晶界的连续DRX （CDRX）晶粒表现出相反的晶格旋转方向，而几何DRX （GDRX）晶粒表现出随机旋转方向。不连续DRX （DDRX）在没有晶格旋转的情况下发生，主要由晶界迁移控制。值得注意的是，与GDRX相比，CDRX成核需要更大的亚晶旋转角度。本研究首次详细研究了立方Mg2Si析出物对再结晶的影响，并提供了CDRX和GDRX中亚晶粒旋转行为的系统表征，为Al-Mg-Si合金的热变形机制提供了新的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Materials Research and Technology-Jmr&t Materials Science-Metals and Alloys

CiteScore

8.80

自引率

9.40%

发文量

1877

审稿时长

35 days

期刊介绍： The Journal of Materials Research and Technology is a publication of ABM - Brazilian Metallurgical, Materials and Mining Association - and publishes four issues per year also with a free version online (www.jmrt.com.br). The journal provides an international medium for the publication of theoretical and experimental studies related to Metallurgy, Materials and Minerals research and technology. Appropriate submissions to the Journal of Materials Research and Technology should include scientific and/or engineering factors which affect processes and products in the Metallurgy, Materials and Mining areas.