PENGARUH TEMPERATUR AGING PADA PROSES HEAT TREATMENT TERHADAP KEKERASAN DAN STRUKTUR MIKRO PADA MATERIAL AA 2024-T351

ADITYATAMA, GALIH (2018) PENGARUH TEMPERATUR AGING PADA PROSES HEAT TREATMENT TERHADAP KEKERASAN DAN STRUKTUR MIKRO PADA MATERIAL AA 2024-T351. Skripsi thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Aluminum (Al) is a type of metal that is widely used in industry. Al can be combined with other elements such as Copper (Cu) to increase the strength of physical or mechanical properties. One of the applications of Al-Cu alloys is on the construction under the wings of the aircraft where the section requires high tensile strength and hardness because the material will experience a variety of dynamic loads. This condition causes the decreasing hardness and ductility of the material due to the material strengthening of the microstructure changes with the life of the material. Al with main alloy of Cu makes the material able to be given process of heat treatment to increase the strength and hardness so that mechanical properties become better, the research was conducted to identify the effect of artificial aging temperature, natural aging and over aging to hardness and Al-Cu micro structure when the specimen heated in solution treatment of 500°C in one hour and was quenched on oil with experimental method. The results showed the highest hardness value of Al-Cu material given artificial aging treatment with 175 ° C for one hour was 159.84 VHN and the lowest hardness value at 225°C was 108.33 VH. The result of microstructural photo showed the size the precipitate became progressively smoother and there was no significant precipitate agglomeration in 175°C .

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