Role of Strain Path Change on Texture and Microstructure of Accumulative Roll-Bonding (ARB) Processed Aluminum: A Comparative Study of Unidirectional and Reverse ARB

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2024-11-05 DOI:10.1007/s12540-024-01834-2

Ning Nie, Chen Yuan, Lisha Shi, Yu Liu, Hui Wang

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Abstract

In accumulative roll-bonding (ARB) process, the cumulative shear strain in stacked sheets is complicated because of repetitive cutting-stacking and roll-bonding. To study the effect of strain path change on microstructure and texture, reverse ARB, in addition to unidirectional ARB, was conducted to generate a comparative through-thickness shear strain. Electron backscattered diffraction (EBSD) was used to characterize the through-thickness microstructure and texture. Differences in texture and microstructure between the unidirectional ARB and reverse ARB were revealed. It was surprisingly observed that finer microstructure was located at the sheet inner region, but not the widely reported surface region. The combination of shear strain imposed in each cycle was used to qualitatively explain this unusual phenomenon. The low introduced strain magnitude led to a pronounced role of shear strain path change in determining deformation features.

Graphical Abstract

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应变路径变化对累积滚接（ARB）加工铝织构和组织的影响：单向和反向滚接的比较研究

在累积滚粘接过程中，由于重复切割-堆积和滚粘接，叠片的累积剪切应变非常复杂。为了研究应变路径变化对组织和织构的影响，除了单向ARB外，还进行了反向ARB，以产生比较的全厚度剪切应变。利用电子背散射衍射（EBSD）表征了该材料的显微结构和织构。揭示了单向ARB和反向ARB在织构和显微组织方面的差异。令人惊讶的是，更细的微观结构位于薄片内部区域，而不是广泛报道的表面区域。每个循环中施加的剪切应变的组合被用来定性地解释这种不寻常的现象。引入的低应变量级导致剪切应变路径变化在决定变形特征方面的作用显著。图形抽象

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.