Analisys of casting defects and mechanical properties on Al-Si alloys using Bangkalan local clays as sand casting binderCandi Galih Syaifullah, Ayik Bela Saputra, F Shabrina Ruhyatul and Poppy PuspitasariMATEC Web Conf., 204 (2018) 05014DOI: https://doi.org/10.1051/matecconf/201820405014