Multistage artificial aging optimization for tensile properties of Duralium using Response Surface Method (RSM)Poppy Puspitasari, Tsamroh Dewi Izzatus, Mochamad Achyarsyah, Beny Bandanajaya and Dewi puspitasariMATEC Web Conf., 204 (2018) 00007DOI: https://doi.org/10.1051/matecconf/201820400007