Maruz Kalma Süresinin Fonksiyonu Olarak MSLA 3B Yazdırmada Fonksiyonel Olarak Derecelendirilmiş Malzemelerin Çekme Özellikleri

Öz

İşlevsel olarak derecelendirilmiş eklemeli imalat (FGAM), İşlevsel Olarak Derecelendirilmiş Malzemelerin eklemeli imalata entegrasyonundan ortaya çıkmıştır. Bu çalışma, çekme numunelerinin hem dış hem de iç bölgelerinin özelliklerini değiştirmek için FGAM numunelerinin üretimini içermektedir. Bu, ek maliyet veya ekipman olmadan maruz kalma süresinin ayarlanmasıyla yapılmıştır. Değerlendirme sırasında, çekme numunesi üç bölgeye ayrılmıştır. Dış katmanlar başlangıçta 3 saniyelik pozlama süresiyle, ardından 15 saniyelik pozlama süresiyle iç katmanlar oluşturulmuştur. Daha sonra, dış katmanlar 15 saniye ve iç katmanlar 3 saniye maruz bırakılarak işlem tersine çevrilmiştir. Daha sonra, tüm katmanlar herhangi bir değişiklik yapılmadan sırasıyla 3 saniye ve 15 saniye maruz kalma süreleri kullanılarak oluşturulmuş ve toplam 4 farklı numune elde edilmiştir. Sertlik ve çekme testleri, son kürlemenin etkisini değerlendirmek amacıyla hem son kürlemeden sonra hem de son kürleme yapılmadan tüm numuneler üzerinde gerçekleştirilmiştir. Bulgular, son kürleme işlemi ilerledikçe sertlik ve maksimum çekme mukavemeti seviyelerinin arttığını, ancak uzama kabiliyetinin azaldığını göstermektedir. Son kürleme ile 15 saniye maruz kalma süresinden sonra elde edilen en yüksek nihai çekme mukavemeti 46.46 ± 0.9 MPa olarak ölçülmüştür. Yeşil FGAM numuneleri, 15-3-15 saniyelik bir maruz kalma süresiyle oluşturulduğunda daha yüksek bir nihai gerilme mukavemetine (35,85 ± 0,4 MPa) sahiptir. Bununla birlikte, 3-15-3 saniyelik bir maruz kalma süresiyle üretilen numune, son kürlemenin ardından daha yüksek bir nihai gerilme mukavemeti (38,77 ± 0,7 MPa) göstermektedir.

Anahtar Kelimeler

• Fonksiyonel olarak derecelendirilmiş malzeme
• eklemeli imalat
• 3B yazdırma
• SLA yazıcı.

The Tensile Properties of Functionally Graded Materials in MSLA 3D Printing as a Function of Exposure Time

Abstract

Functionally graded additive manufacturing (FGAM) emerged from the combination of Functionally Graded Materials into additive manufacturing. This work involved the production of FGAM specimens to alter the characteristics of both the outer and inner zones of tensile specimens. This was achieved by adjusting the exposure time without additional costs or equipment. During the assessment, the tensile specimen was separated into three zones. The exterior layers were initially created with a 3-second exposure time, followed by the interior layers with a 15-second exposure time. Then, the process was reversed, with the outer layers exposed for 15 seconds and the inner layers exposed for 3 seconds. Subsequently, all layers were generated using exposure durations of 3 seconds and 15 seconds, respectively, without any alterations, resulting in a total of 4 distinct samples. The hardness and tensile tests were conducted on all specimens, both with and without post-curing, in order to assess the impact of post-curing. The outcomes indicate that the levels of hardness and maximum tensile strength rise as the final curing process progresses, but the elongation capability diminishes. The highest ultimate tensile strength, achieved after 15 seconds of exposure time with post cure, was measured at 46.46 ± 0.9 MPa. The green FGAM specimens have a greater ultimate tensile strength (35.85 ± 0.4 MPa) when created with an exposure time of 15-3-15 s. However, the specimen produced with an exposure time of 3-15-3 s demonstrates a higher ultimate tensile strength (38.77 ± 0.7 MPa) following post curing.

Keywords

• MSLA printer
• 3D printing
• functionally graded material
• additive manufacturing

Kaynakça

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