Studi Pengaruh Artificial Aging Terhadap Uji Impak Pada Material AA 7075
Keywords:
heat treatment, aging, impact testAbstract
AA 7075 is one of the high-strength aluminum alloys widely used in the automotive industry. The composition of AA 7075 alloy, mainly zinc (Zn), magnesium (Mg), and copper (Cu), which form the Al–Zn–Mg–Cu alloy system, offers strong mechanical properties. This study aims to assess the effect of artificial aging on material toughness through Charpy impact testing in accordance with the ASTM E23 standard. The temperatures used were 160°C, 170°C, and 180°C with time variations of 6 hours, 9 hours, and 12 hours in the artificial aging experiment. The test results without heat treatment showed an impact test value of 0.0454 J/mm², after being given a heat treatment of 480°C and aging, the impact test value for artificial aging was 0.0627 J/mm². Artificial aging treatment is able to produce random particle grain boundaries with long temperature and time settings so that it can increase the impact test value. Based on the calculation results, the most influential factor in increasing the impact test value was temperature, with a value of 27.37%. The heat treatment and aging parameter settings obtained to obtain the highest impact test value were at a temperature of 160°C for a duration of 9 hours.References
Arsyad, Hairul. (2024). “Karakteristik Deformasi Akibat Beban Impak Dari Mikrostruktur Transisi Hasil Natural Aging Paduan Al-2024.” Jurnal Teknik Mesin Universitas Andalas, vol. 20, no. 1, pp. 1–6
Derianto, Rizky, Muhammad Taufiqurrahman, and Muhammad Ivanto. (2024). “Rancang Bangun Alat Uji Impact 100 Joule Type Charpy Skala Laboratorium.” Jurnal Teknologi Rekayasa Teknik Mesin, vol. 5, no. 2, pp. 19–24
Erik Kurniawan Widyantoro. (2018). “Pengaruh Variasi Temperatur Aging Pada Aluminium 6061 Terhadap Uji Impak, Kekerasan, Dan Struktur Mikro.” Skripsi Teknik Mesin Industri, Institut Teknologi Sepuluh November Surabaya
Gunawan, Sigit. (2016). “Efek Perlakuan Panas Aging Terhadap Kekerasan Dan Ketangguhan Impak Paduan Alumunium AA 514.0.” TRAKSI: Majalah Ilmiah Teknik Mesin, vol. 16, no. 1, pp. 1–9
Rakadhani, Ihrom, and Catur Tunggal. (2024). “Studi Pengaruh Temperatur Aging Terhadap Kekerasan Vickers, Ketahanan Impak Dan Korosi Pada Aluminium Paduan.” Jurnal Material dan Proses Manufaktur, vol. 8, pp. 49–56
Rizal, Syahrul, Priyagung Hartono, and Artono Raharjo. (2023). “Pengaruh Temperatur Solution Treatment Dan Artificial Aging Terhadap Sifat Mekanis Pada Alluminium Alloy 7075.” Jurnal Teknik Mesin, Universitas Islam Malang, pp. 2–5.
Society, American. (1982). ASTM E23: Standard Test Methods for Notched Bar Impact Testing of Metallic Materials.
Tata Surdia, Shinroku Saito. (2005). Pengetahuan Bahan Teknik. Jakarta: Paradnya Paramita.
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