Original scientific paper

Fatigue strength of Al-Cu cast alloy with different pouring temperature

. Akhyar orcid.org/0000-0003-2006-0126 ; Department of Mechanical Engineering, Universitas Syiah Kuala, Jln. Syech Abdurrauf No.7, Darussalam – Banda Aceh, 23111, Indonesia *
P. T. Iswanto ; Department of Mechanical and Industrial Engineering, Gadjah Mada University (UGM), Jln. Grafika No.2, Yogyakarta, 55281, Indonesia
V. Malau ; Department of Mechanical and Industrial Engineering, Gadjah Mada University (UGM), Jln. Grafika No.2, Yogyakarta, 55281, Indonesia
F. V. Putra ; Department of Mechanical and Industrial Engineering, Gadjah Mada University (UGM), Jln. Grafika No.2, Yogyakarta, 55281, Indonesia
A. Farhan ; Department of Physic Education, FKIP Universitas Syiah Kuala, Banda Aceh, Indonesia

* Corresponding author.

Abstract

This experiment aimed to evaluate how pouring temperature affects fatigue strength of Al-Cu cast alloy. Subsequently, commercial aluminum ingots, such as Al-2024 were remelted and then machined into samples for both tensile and fatigue testing. These samples were cast at three different temperature of 688, 738, and 788 °C while maintaining a constant mold temperature of 220 °C. The results showed that the highest tensile strength was 201,06 MPa at 738 °C. Additionally, the greatest fatigue strength was observed at 80,4 MPa at pouring temperature of 738 °C. It was observed that variations in pouring temperature can significantly impact fatigue strength of cast alloy. At the highest pouring temperature of 788 °C, the presence of pores in the metal casting samples resulted in a decrease in both tensile and fatigue strength. Furthermore, when examining the surface fractography of casting sample, the presence of brittle cracks in alloy was observed.

Keywords

Al-Cu cast alloy; fatigue strength; tensile strength; pouring temperature; microstructure

Hrčak ID:

312260

URI

https://hrcak.srce.hr/312260

Publication date:

1.4.2024.

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