Masyrukan, Darmawan AS, Yulianto A, Hamid A. Hardness Enhancement in Al-Si Alloy Through Combined Pressing and Heat Treatment with Coconut Shell Charcoal Media . Metall Mater Eng [Internet]. 2024 Nov. 25 [cited 2026 May 23];30(3):54-66. Available from: https://www.metall-mater-eng.com/index.php/home/article/view/1099