Microstructure and mechanical properties of wear-resistant SiCp/Al composite layers on 6061 aluminum alloy fabricated by additive friction stir deposition

IF 11.1 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Additive manufacturing Pub Date : 2025-07-05 DOI:10.1016/j.addma.2025.104880

Bin He , Caiyan Deng , Haining Yao , Sijia Wang , Yiming Huang , Hongbin Zhu , Lei Cui

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引用次数: 0

Abstract

Due to the excellent wear properties of the SiC particles reinforced aluminum matrix composites(SiC_p/Al) and its good compatibility with the aluminum alloy substrate, the fabrication of a SiC_p/Al layer is an effective way to improve the surface wear resistance of aluminum alloys. In this study, the microstructure and mechanical properties of a 20 vol% SiC_p+ZL101 composite deposition layer on the surface of 6061-T6 fabricated by the additive friction stir deposition (AFSD) process. The results show that plastic deformation leads to approximately 97 % grain refinement in the deposition layer compared to the rod material (RM). SiC_p are fragmented and refined, with an average size reduction from 4.54 μm × 2.80 μm (RM) to 2.40 μm × 1.52 μm, achieving a uniform distribution. The tensile strength of deposition layer reaches 300 MPa, a 47 % improvement over the RM. A defect-free metallurgical bond is formed at the interface, and fine-grained regions at the interface enhance crack resistance, with a shear strength of 177 MPa. Both RM and the deposition layer exhibited characteristics of abrasive wear and oxidative wear. Compared to the RM, the deposition layer showed a ∼10 % reduction in wear rate. The tensile strength of the deposit layer has been enhanced without compromising wear resistance. This study provides insights for using AFSD in fabricating wear-resistant surface layers or surface-modified components.

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添加搅拌摩擦沉积法制备6061铝合金SiCp/Al耐磨复合层的组织与力学性能

由于SiC颗粒增强铝基复合材料（SiCp/Al）具有优异的耐磨性能，且与铝合金基体具有良好的相容性，因此制备SiCp/Al层是提高铝合金表面耐磨性的有效途径。本文研究了采用添加剂搅拌摩擦沉积（AFSD）工艺在6061-T6表面制备的体积为20 % SiCp+ZL101复合沉积层的显微组织和力学性能。结果表明，与棒材（RM）相比，塑性变形导致沉积层的晶粒细化率约为97% %。SiCp碎片化和细化，平均尺寸从4.54 μm × 2.80 μm （RM）减小到2.40 μm × 1.52 μm，实现均匀分布。沉积层的抗拉强度达到300 MPa，比RM提高了47 %。界面处形成无缺陷的金相结合，界面处的细晶区增强了抗裂性，抗剪强度为177 MPa。RM和沉积层均表现出磨粒磨损和氧化磨损的特征。与RM相比，沉积层的磨损率降低了~ 10 %。在不影响耐磨性的情况下，沉积层的抗拉强度得到了提高。该研究为使用AFSD制造耐磨表面层或表面改性部件提供了见解。

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

Additive manufacturing Materials Science-General Materials Science

CiteScore

19.80

自引率

12.70%

发文量

648

审稿时长

35 days

期刊介绍： Additive Manufacturing stands as a peer-reviewed journal dedicated to delivering high-quality research papers and reviews in the field of additive manufacturing, serving both academia and industry leaders. The journal's objective is to recognize the innovative essence of additive manufacturing and its diverse applications, providing a comprehensive overview of current developments and future prospects. The transformative potential of additive manufacturing technologies in product design and manufacturing is poised to disrupt traditional approaches. In response to this paradigm shift, a distinctive and comprehensive publication outlet was essential. Additive Manufacturing fulfills this need, offering a platform for engineers, materials scientists, and practitioners across academia and various industries to document and share innovations in these evolving technologies.