Tribological behavior of AlSn20Cu alloy manufactured by additive friction stir deposition

IF 5.3 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear Pub Date : 2024-10-18 DOI:10.1016/j.wear.2024.205606

Ziming Zeng , Yidi Li , Hui Wang , Ruilin Lai , Jianwei Teng , Yunping Li

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引用次数: 0

Abstract

Al-Sn alloy is utilized as a bearing material to replace conventional Sn-based alloy in the design of bearing liners due to its higher load-carrying capacity and wear resistance. However, cracks readily initiate in casting Al-Sn alloy near the coarse Sn phase, leading to low mechanical properties and insufficient wear resistance. The present study introduces a new method, additive friction stir deposition (AFSD), to produce AlSn20Cu alloy with fine grains and sub-micron-scale Sn phases, resulting in enhanced mechanical performance and wear resistance. Compared to both casting and cold rolling + annealing AlSn20Cu alloys, the ultimate tensile strength of AFSD AlSn20Cu alloy is improved by 80.56 % and 16.67 % respectively. Additionally, AFSD AlSn20Cu alloy demonstrates a lower coefficient of friction (COF) and lower wear rate without significant subsurface damage. This is attributed to the fine and uniformly distributed Sn phase forming a uniform and dense surface lubrication layer that adapts the friction pair to the boundary lubrication state, preventing the initiation and development of cracks.

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添加剂摩擦搅拌沉积法制造的 AlSn20Cu 合金的摩擦学行为

铝锡合金具有更高的承载能力和耐磨性，因此在轴承衬里的设计中被用作轴承材料，以取代传统的锡基合金材料。然而，在铸造铝锡合金时，粗锡相附近容易产生裂纹，导致机械性能低下和耐磨性不足。本研究介绍了一种新方法--添加剂摩擦搅拌沉积（AFSD），用于生产具有细晶粒和亚微米级锡相的 AlSn20Cu 合金，从而提高机械性能和耐磨性。与铸造和冷轧 + 退火 AlSn20Cu 合金相比，AFSD AlSn20Cu 合金的极限抗拉强度分别提高了 80.56 % 和 16.67 %。此外，AFSD AlSn20Cu 合金的摩擦系数（COF）更低，磨损率也更低，而且没有明显的表面下损伤。这归因于细小且均匀分布的 Sn 相形成了均匀致密的表面润滑层，使摩擦副适应了边界润滑状态，防止了裂纹的产生和发展。

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

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.