Influence of heat treatment and anodizing on the corrosion behaviour of additive manufactured AlSi10Mg alloy

IF 1.9 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Bulletin of Materials Science Pub Date : 2024-10-10 DOI:10.1007/s12034-024-03223-2

P Chandramohan, R Raghu, K Dharmaseelan, S Harinadh

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Abstract

Additive manufacturing (AM) processes produce complex and multifunctional items by layering pre-alloyed powder. Among them, direct metal laser sintering (DMLS) process encourages creation of distinct microstructures and internal phase distributions. These microstructures possess substantial influence on corrosion performance and mechanisms of corrosion resistance-improving surface treatments, such as anodizing. Hence, this study emphasize on corrosion performance of anodized and unanodized heat-treated AlSi10Mg samples manufactured through DMLS method. As built AlSi10Mg samples were subjected to stress relieving and T6 heat-treatment. The heat-treated samples were further subjected to anodizing process in H₂SO₄ electrolyte solution. Microstructural characterization of unanodized and anodized heat-treated samples was performed through microscopy analysis. In addition, corrosion experiments were performed in 1 M H₂SO₄ solution on anodized and unanodized heat-treated samples to determine E_corr, I_corr and corrosion rate values. The corroded samples are further characterized to understand different failure mechanisms.

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热处理和阳极氧化对添加剂制造的 AlSi10Mg 合金腐蚀性能的影响

增材制造（AM）工艺通过分层预合金化粉末来生产复杂的多功能物品。其中，直接金属激光烧结（DMLS）工艺鼓励创建独特的微结构和内部相分布。这些微观结构对腐蚀性能和阳极氧化等提高耐腐蚀性能的表面处理机制具有重大影响。因此，本研究重点关注通过 DMLS 方法制造的阳极氧化和未阳极氧化热处理 AlSi10Mg 样品的腐蚀性能。制造好的 AlSi10Mg 样品要进行应力消除和 T6 热处理。热处理后的样品在 H2SO4 电解质溶液中进行阳极氧化处理。通过显微镜分析，对未阳极氧化和阳极氧化热处理样品进行了微观结构表征。此外，还在 1 M H2SO4 溶液中对阳极氧化和未阳极氧化的热处理样品进行了腐蚀实验，以确定 Ecorr、Icorr 和腐蚀速率值。对腐蚀后的样品进行了进一步表征，以了解不同的失效机制。

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

Bulletin of Materials Science 工程技术-材料科学：综合

CiteScore

3.40

自引率

5.60%

发文量

209

审稿时长

11.5 months

期刊介绍： The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.