Purpose

Dissimilar materials found applications in the structural fields to withstand the different types of loads and provide multi-facet properties to the final structure. Aluminum alloy materials are mostly used in aerospace and marine industries to provide better strength and safeguard the material from severe environmental conditions. The purpose of this study is to develop new material with superior strength to challenge the severe environmental conditions.

Design/methodology/approach

In the present investigation, friction stir welding (FSW) dissimilar joints were prepared from AA6061 and AA5083 aluminum alloys, and the weld nugget (WN) was reinforced with hard reinforcement particles such as La₂O₃ and CeO₂. The tribological and mechanical properties of the prepared materials were tested to analyze the suitability of material in the aerospace and marine environmental conditions.

Findings

The results showed that the AA6061–AA5083/La₂O₃ material exhibited better mechanical and tribological characteristics. The FSW dissimilar AA6061–AA5083/La₂O₃ material exhibited lower wear rate of 7.37 × 10⁻³ mm3/m and minimum friction coefficient of 0.31 compared to all other materials owing to the reinforcing effect of La₂O₃ particles and the fine grains formed by FSW process at WN region. Further, FSW dissimilar AA6061–AA5083/La₂O₃ material displayed a maximum tensile strength and hardness of 378 MPa and 118 HV, respectively, among all the other materials tested.

Originality/value

This work is original and novel in the field of materials science engineering focusing on tribological characteristics of friction stir welded dissimilar aluminum alloys by the reinforcing effect of hard particles such as La₂O₃ and CeO₂.

中文翻译：

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CeO2和La2O3纳米颗粒增强搅拌摩擦焊异种铝合金AA6061-AA5083的摩擦学特性

目的

不同的材料在结构领域得到了应用，以承受不同类型的载荷并为最终结构提供多方面的特性。铝合金材料主要用于航空航天和海洋工业，以提供更好的强度并保护材料免受恶劣环境条件的影响。这项研究的目的是开发具有优越强度的新材料来挑战恶劣的环境条件。

设计/方法/方法

在本研究中，搅拌摩擦焊 (FSW) 异种接头由 AA6061 和 AA5083 铝合金制成，焊核 (WN) 用硬质增强颗粒如 La ₂ O ₃和 CeO ₂增强。对制备的材料的摩擦学和机械性能进行了测试，以分析材料在航空航天和海洋环境条件下的适用性。

发现

结果表明，AA6061-AA5083/La ₂ O ₃材料表现出更好的机械和摩擦学特性。由于 La ₂ O ₃颗粒的增强作用和细颗粒，FSW 异种 AA6061–AA5083/La ₂ O ₃材料与所有其他材料相比，具有 7.37 × 10 ^-3 mm3/m 的较低磨损率和 0.31 的最小摩擦系数。WN 区域通过 FSW 工艺形成的晶粒。此外，在所有其他测试材料中，FSW 不同的 AA6061–AA5083/La ₂ O ₃材料的最大拉伸强度和硬度分别为 378 MPa 和 118 HV。

原创性/价值

这项工作在材料科学工程领域具有独创性和新颖性，重点是通过 La ₂ O ₃和 CeO ₂等硬质颗粒的增强作用来研究搅拌摩擦焊接异种铝合金的摩擦学特性。