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首页> 外文期刊>Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science >Specific Features of Microstructural Evolution During Hot Rolling of the As-Cast Magnesium-Rich Aluminum Alloys with Added Transition Metal Elements
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Specific Features of Microstructural Evolution During Hot Rolling of the As-Cast Magnesium-Rich Aluminum Alloys with Added Transition Metal Elements

机译：添加镁富铝合金热轧过程中微结构演化的具体特征

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摘要

This study addresses specific features of microstructural development during the rolling of the as-cast magnesium-rich aluminum alloys with added transition metal elements, such as Zr and Sc. For investigation purposes, three magnesium-rich aluminum alloys were chosen: 5182 without added Zr and Sc, 1565 ch with added Zr and 1570 with added Zr and Sc. Optical microscopy, X-ray texture analysis, electron microscopy, and electron backscattered diffraction methods were used in this study. This study demonstrates that two completely different patterns can be observed in the microstructure during deformation. Two zones with different subgrain sizes are formed when the alloy tends to recrystallize. Without recrystallization, the structure develops homogeneously. Recrystallization also has a significant effect on the texture formation. If recrystallization does not occur, a strong beta-fiber texture is formed. However, this type of texture tends not to form during inter-deformation intervals when recrystallization occurs. Second-phase particles have the strongest effect on microstructural evolution during the hot deformation of the as-cast structure. Fine particles are capable of inhibiting recrystallization. Coarse particles initiate the PSN (particle-stimulated nucleation) mechanism and suppress the growth of the cubic texture component during recrystallization. An adequate combination of coarse and fine particles enables either better homogeneity of the structure distribution in the deformation center or better grain structure refinement.
机译：本研究解决了在富浇注的富含镁的铝合金中的微观结构显影的具体特征，添加过渡金属元素，例如Zr和Sc。对于调查目的，选择三种富含镁的铝合金：5182，无需加入Zr和Sc，1565 Ch，加入Zr和1570，加入Zr和Sc。本研究使用光学显微镜，X射线纹理分析，电子显微镜和电子背散射衍射方法。该研究表明，在变形期间的微观结构中可以观察到两个完全不同的图案。当合金倾向于重结晶时，形成具有不同粒度尺寸的两个区域。没有重结晶，结构均匀地发展。重结晶在纹理形成也具有显着影响。如果不会发生重结晶，则形成强β-纤维纹理。然而，当发生重结晶时，这种类型的纹理倾向于在变形间隔期间形成。第二相颗粒对铸造结构的热变形期间对微观结构演化具有最强的影响。细颗粒能够抑制重结晶。粗颗粒引发PSN（颗粒刺激的成核）机制，并在重结晶期间抑制立方纹理成分的生长。粗糙和细颗粒的足够组合使得能够更好地具有变形中心或更好的晶粒结构细化的结构分布的均匀性。

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