Dewi ‘Izzatus Tsamroh, Poppy Puspitasari, Muchammad Riza Fauzy, Agus Suprapto, Pungky Eka Setyawan
The main focus of this study is the microstructure changes of aluminum 6061 after natural and artificial aging. Aluminum 6061 has been aged naturally in room temperature for 7 days before aged artificially. Artificial aging has been conducted at a temperature of 200°C, withholding time variations of 2, 4, and 6 hours. According to the microstructure test, the grain size of aluminum 6061 got smaller after artificial aging for 4 hours, and then it got bigger after artificial aging for 6 hours. The study result showed that the best outcome was artificial for 4 hours after natural aging. This result was in line with the hardness test result, where the highest hardness number was obtained in specimens with artificial aging treatment for 4 hours after natural aging with a hardness number of 106.8 HRE. The increasing hardness was thought to be due to the formation of Mg2Si precipitates. © 2023 selection and editorial matter, Samsul Ariffin Abdul Karim.
Faculty of Engineering, University of Merdeka, Malang, Indonesia; Faculty of Engineering, Universitas Negeri, Malang, Indonesia; Centre of Advanced Materials for Renewable Energy (CAMRY), Universitas Negeri, Malang, Indonesia; Faculty of Engineering, University of Merdeka, Malang, Indonesia
