Eriyik Yığma Modellemeye Dayalı 3B Baskılı PLA ve Tok PLA Malzemelerinin Aşınma Özelliklerinin Deneysel Olarak Değerlendirilmesi

Bu çalışma, eklemeli imalat uygulamalarında yaygın olarak kullanılan iki polimer malzemenin, PLA (Poli Laktik Asit) ve Tough PLA'nın aşınma özelliklerini araştırmıştır. Numuneler, Eriyik Yığma Modelleme kullanılarak bir 3D yazıcıda %100 doluluk oranıyla üretildi. Numunelerin aşınma özelliklerini analiz etmek için sertlik ölçümleri ve aşındırma aşınma testleri yapılmıştır. Karşılaştırma, hacim kaybı, sürtünme katsayısı ve özgül aşınma oranı gibi parametreleri içeriyordu. Ayrıca aşınmış yüzeylerin kalitesini değerlendirmek için yüzey pürüzlülük ölçümleri yapılmıştır. Aşınma mekanizmaları hakkında bilgi elde etmek için aşınma haritaları oluşturuldu ve aşınmış yüzeyleri tanımlamak için taramalı elektron mikroskobu ve enerji dağıtıcı X-ışını spektroskopisi kullanıldı. Sonuçlar, Tough PLA'nın PLA'ya kıyasla üstün aşınma direnci sergilediğini gösterdi. Uygulanan yüke ve kayma mesafelerine bağlı olarak yorulma, mikro kırılma ve mikro kesme mekanizmaları aşınma sürecine katkıda bulunan faktörler olarak belirlenmiştir. Ayrıca, uygulanan daha yüksek yüklerin yüzey pürüzlülük değerlerinde önemli bir artışa neden olduğu gözlenmiştir.

Anahtar Kelimeler:

Aşınma, PLA, Tok PLA, Eriyik Yığma Modelleme, 3B Baskı

Experimentally Assessing the Wear Characteristics of 3D-Printed PLA and Tough PLA Materials Based on Fused Deposition Modeling

This study investigated the wear properties of two commonly utilized polymer materials, PLA (Poly Lactic Acid) and Tough PLA, in additive manufacturing applications. The samples were produced with a 100% infill rate on a 3D printer using Fused Deposition Modeling. Hardness measurements and abrasive wear tests were conducted to analyze the wear characteristics of the samples. The comparison involved parameters such as volume loss, coefficient of friction, and specific wear rate. Additionally, surface roughness measurements were performed to assess the quality of the worn surfaces. Wear maps were constructed to obtain information about the wear mechanisms, and scanning electron microscopy and energy-dispersive X-ray spectroscopy were used to describe the worn surfaces. The results demonstrated that Tough PLA exhibited superior wear resistance compared to PLA. Depending on the applied load and sliding distances, fatigue, micro-fracture, and micro-cutting mechanisms were identified as contributing factors to the wear process. Furthermore, it was observed that higher applied loads resulted in a significant increase in surface roughness values.

Keywords:

Wear, PLA, Tough PLA, Fused Deposition Modeling, 3D-Printing,

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