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  Citation Number 4
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AA2024-T3 alüminyum alaşımlarına uygulanan farklı yüzey hazırlama ve pürüzlülük işlemlerinin yapıştırma bağlantılarına etkisi
2021
Journal:  
Gümüşhane Üniversitesi Fen Bilimleri Dergisi
Author:  
Abstract:

Yapıştırma bağlantılarının dayanımı; yapıştırılan malzemelerin yüzeyine uygulanacak işlemlere ve yapıştırıcıların türüne göre değişiklikler göstermektedir. Özellikle yapışma yüzeyine uygulanacak yüzey işlemleri, yapıştırma bağlantılarının dayanımını arttırmakta önemli bir rol oynamaktadır. Bu çalışmada, farklı yüzey hazırlama işlemlerinin ve yüzey pürüzlülüğünün yapıştırma bağlantılarının hasar yüküne olan etkisi incelenmiştir. Bu amaçla havacılık alanında kullanılan AA2024-T3 alüminyum alaşımı yapıştırılan malzeme olarak kullanılmış ve yapışma yüzeyine mekanik ve kimyasal yüzey hazırlama işlemleri uygulanmıştır. Mekanik yüzey hazırlama işlemi olarak beş farklı boyutta zımparalama, kimyasal yüzey hazırlama işlemi olarak ise sodyum dikromat/sülfürik asit, optimize edilmiş sodyum dikromat/sülfürik asit ve ferrik sülfat/sülfürik asit dağlama çözeltileri kullanılarak alüminyum alaşımlarının yapışma yüzeyleri hazırlanmıştır. Epoksi ve akrilik esaslı yapıştırıcılar, alüminyum alaşımlarının işlem görmüş yüzeylerine uygulanarak tek tesirli bağlantı numunleri üretilmiştir. Uygulanan yüzey işlemleri sonucunda alüminyum alaşımlarının yüzeylerinde oluşan aşınma ve oksit tabaka SEM tekniği ile analiz edilmiştir. Ayrıca, uygulanan farklı yüzey hazırlama işlemlerinin yapışma bağlantılarının mekanik özelliklerine etkisini incelemek amacıyla, hazırlanan bağlantı numuneleri çekme yükü altında test edilmiştir. Deneysel sonuçlar incelendiğinde, yapıştırma bağlantılarının mekanik özelliklerinin uygulanan yüzey işlemlerine bağlı olarak değiştiği görülmüştür. Yapıştırma bağlantıları için optimum yüzey pürüzlülüğü değerlerinin yapıştırıcı türünün epoksi veya akrilik olmasına bağlı olarak değiştiği gözlemlenmiştir. Ayrıca hasar yüzeyleri incelendiğinde, özel kohezif hasar oluştuğu gözlemlenmiştir.

Keywords:

The effect of the different surface preparation and smoothness processes applied to AA2024-T3 aluminum alloys on the adhesive connections
2021
Author:  
Abstract:

The resistance of the adhesive connections shows changes according to the processes to be applied to the surface of the adhesive materials and the type of adhesives. Surface processes, especially on the adhesive surface, play an important role in increasing the resistance of the adhesive connections. In this study, the impact of the different surface preparation processes and the surface smoothness of the adhesive connections on the damage load was studied. For this purpose, the AA2024-T3 aluminum alloy used in the aviation field has been used as attached material and mechanical and chemical surface preparation processes have been applied to the attachment surface. As a mechanical surface preparation process, five different sizes of clamping, and as a chemical surface preparation process, the clamping surfaces of sodium dicromate/sulfuric acid, optimized sodium dicromate/sulfuric acid and ferric sulphate/sulfuric acid dispersion solutions are prepared using aluminum alloys. Epoxy and acrylic-based adhesives are produced with single-covered connectivity samples applied to the processed surfaces of aluminium alloys. The application of surface processes resulted in the analysis of the coating and oxide layer formed on the surface of aluminum alloys with the SEM technique. In addition, the prepared connection samples have been tested under the drawing load in order to study the impact of the various surface preparation processes on the mechanical characteristics of attachment connections. When experimental results were studied, it was found that the mechanical characteristics of the adhesive connections varied depending on the surface processes applied. It has been observed that the optimum surface smoothness values for adhesive connections vary depending on the type of adhesive is epoxy or acrylic. Also, when the damage surfaces are studied, it has been observed that special cohesive damage has occurred.

Keywords:

Effect Of Different Surface Preparation and Roughness Treatments Applied To Aa2024-t3 Aluminum Alloys In Bonded Joints
2021
Author:  
Abstract:

Strength of bonding joints varies according to the applied processes on the surface of the adherend and the type of adhesives. Particularly, surface treatments to be applied to the adherend surface play an important role in increasing the strength of the adhesively bonded joints. In this study, the effect of different surface preparation processes and surface roughness on the failure load of adhesively bonded joints was investigated. For this purpose, AA2024-T3 aluminum alloy used in aviation field was used as adherend, mechanical and chemical surface preparation processes were applied to the bonding surface. Sanding in five different sizes as the mechanical surface preparation process and sodium dichromate/sulfuric acid, optimized sodium dichromate/sulfuric acid and ferric sulphate/sulfuric acid etching solutions as the chemical surface preparation process were used to prepare the bonding surfaces of aluminum alloys. Epoxy and acrylic based adhesives were applied to the treated surfaces of aluminum alloys to produce single lap joint samples. As a result of the applied surface treatments, the abrasion and oxide layer formed on the surfaces of aluminum alloys were analyzed by SEM technique. In addition, the prepared joint samples were tested under tensile load in order to examine the effect of different surface preparation processes on the mechanical properties of adhesively bonded joints. When the experimental results were examined, it was seen that the mechanical properties of the adhesive joints changed depending on the applied surface treatments. It was observed that the optimum surface roughness values for bonding joints vary depending on the type of adhesive being epoxy or acrylic. In addition, when the damage surfaces were examined, it was observed that special cohesive failure occurred.

Keywords:

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Gümüşhane Üniversitesi Fen Bilimleri Dergisi

Field :   Fen Bilimleri ve Matematik; Mimarlık, Planlama ve Tasarım; Mühendislik; Ziraat, Orman ve Su Ürünleri

Journal Type :   Uluslararası

Metrics
Article : 674
Cite : 1.277
2023 Impact : 0.167
Gümüşhane Üniversitesi Fen Bilimleri Dergisi