Al7075-Al2O3 Kompozitlerin Toz Metalürjisi ve Sıcak Preslemeyle Üretimi ve Mekanik Özelliklerinin Araştırılması

Year 2024, , 307 - 320, 31.12.2024

Elif Işık , Aleyna Taşkın , Mahmut Can Şenel

https://doi.org/10.54370/ordubtd.1441367

Abstract

Bu çalışmada, ağırlıkça farklı oranlarda (%1, 3, 6, 9, 12, 15) alümina (Al2O3) içeren Al7075 alüminyum matrisli kompozitlerin üretimi ve karakterizasyonu gerçekleştirilmiştir. Toz metalürjisi ve indüksiyonla sıcak presleme yöntemleriyle üretilen numunelerin mikroyapısı, yoğunluğu, gözeneklilik oranı, sertliği ve basma dayanımı incelenmiştir. Çalışma sonucunda artan alümina takviyesinin belli bir orana kadar (ağırlıkça %12) kompozitin mekanik özelliklerini arttırdığı görülmüştür. En yüksek yoğunluğa (2.7 g cm-3), sertliğe (170±2 HV), basma dayanımına (471±6 MPa) ve en düşük gözeneklilik oranına (%8.2) Al7075-%12Al2O3 kompozitte erişilmiştir. Ancak ağırlıkça %15 alümina takviye oranında alümina partiküllerinin topaklanmasından kaynaklı olarak mekanik özeliklerde düşüş görülmüştür.

Keywords

Al7075 alaşımı, alümina, toz metalürjisi, kompozit, mekanik özellik

Ethical Statement

Bu makalenin yayınlanmasıyla ilgili herhangi bir etik sorun bulunmamaktadır.

Thanks

Bu çalışma, Mahmut Can Şenel danışmanlığında Elif Işık tarafından tamamlanan "Al7075-Al2O3-Grafen ve Al7075-ZrO2-Grafen Hibrit Kompozitlerin Mekanik, Tribolojik Özelliklerinin ve Mikroyapısının İncelenmesi" başlıklı yüksek lisans tezinden üretilmiştir (Tez No. 811583)

Investigation of the Mechanical Properties and Fabrication of Al7075-Al2O3 Composites by Powder Metallurgy and Hot Pressing

Abstract

In this work, the fabrication and characterization of Al7075 aluminum matrix composites with different weight ratios (1, 3, 6, 9, 12, 15wt.%) of alumina (Al2O3) contents were carried out. The microstructure, density, porosity rate, hardness, and compressive strength of the samples were examined which were fabricated via the powder metallurgy and induction hot pressing methods. As a result of the study, it was seen that an increase in alumina reinforcement positively affected the microstructure and mechanical properties of the composite up to a certain rate (12% by weight). The highest density (2.7 g cm-3), hardness (170±2 HV), compressive strength (471±6 MPa), and lowest porosity rate (8.2%) were achieved in the Al7075-12%Al2O3 composite. However, a decrease in mechanical properties was observed at 15wt.% alumina reinforcement due to the agglomeration of alumina particles.

Keywords

Al7075 alloy, alumina, powder metallurgy, composite, mechanical property

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