Investigating the Impact of Friction Stir Processing on the Hydrogen Embrittlement in AA6082-T6 Heat-Treatable Aluminum Alloy

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Metals and Materials International Pub Date : 2024-04-13 DOI:10.1007/s12540-024-01668-y

Ioannis G. Papantoniou, Panagiotis Karmiris-Obratański, Beata Leszczyńska-Madej, Dimitrios E. Manolakos

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Abstract

This study investigates the impact of friction stir processing (FSP) on the hydrogen embrittlement (HE) in AA6082-T6 heat-treatable aluminum alloy. The effects of different number of FSP passes and different hydrogen cathodic charging (HCC) conditions on the material’s response to HE are examined through comprehensive mechanical testing, microhardness analysis, and microstructural characterization. The results revealed that FSP leads to a decrease in yield strength, ultimate tensile strength, and microhardness, accompanied by an increase in energy absorption. The introduction of hydrogen through HCC significantly reduces mechanical properties, particularly in non-FSPed specimens. Notably, specimens with 8 FSP passes exhibit an interesting behavior with a slight increase in energy absorption and microhardness values after HCC. Microstructural analysis shows that FSP refines the microstructure, resulting in enhanced resistance to hydrogen-induced blistering effects. These findings contribute to the understanding of hydrogen embrittlement in FSPed aluminum alloys, providing insights for developing surface-modified materials suited for hydrogen-rich applications.

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研究摩擦搅拌加工对 AA6082-T6 热处理铝合金氢脆的影响

本研究探讨了摩擦搅拌加工（FSP）对 AA6082-T6 热处理铝合金氢脆（HE）的影响。通过综合机械测试、显微硬度分析和显微结构表征，研究了不同的 FSP 次数和不同的阴极充氢 (HCC) 条件对材料氢脆响应的影响。结果表明，FSP 导致屈服强度、极限拉伸强度和显微硬度下降，同时能量吸收增加。通过 HCC 引入氢会大大降低机械性能，特别是在非 FSP 试样中。值得注意的是，经过 8 次 FSP 处理的试样表现出一种有趣的行为，即在 HCC 之后能量吸收和显微硬度值略有增加。微观结构分析表明，FSP 精炼了微观结构，从而增强了抗氢致起泡效应的能力。这些发现有助于理解 FSP 铝合金中的氢脆，为开发适合富氢应用的表面改性材料提供了启示。

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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.