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Kusharjanto Kusharjanto
Department of Metallurgical Engineering, University of Jenderal Achmad Yani, Jl. Gatot Subroto, PO Box 807 (PINDAD), Bandung, 40285, West Java, Indonesia
Astronomy Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering

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Effect of Temperature Semi-solid Casting Process on AZ91D Magnesium Alloys to Hardness and Microstructures Kusharjanto Kusharjanto; Sutarno Sutarno; R. Henny Mulyani
Indonesian Journal of Physics Vol 30 No 1 (2019): Vol 30 No 1 (2019)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (578.077 KB) | DOI: 10.5614/itb.ijp.2019.30.1.4

Abstract

This study investigates the effect of temperature semi-solid casting process for magnesium alloys AZ91D in an effort to increase the mechanical properties for the application of lightweight structures. In this experiments, semi-solid casting process is varied temperatures ranging from 500, 510, 520, 530 and 540°C. Results of hardness testing obtained the highest average is 64.4 BHN at a temperature of 500°C, which higher than the as-cast 42.56 BHN (an increase of 33.91%). The increasing of hardness occur because of changes in the microstructure of dendrite structures into globular grains, which have α-Mg phase and ß-Mg17Al12. Small spherical grain shape and spread evenly with a size of 40.08 μm obtained at temperatures of 500°C and size 77.2 μm at temperatures 540°C.
Co-Authors R. Henny Mulyani Sutarno Sutarno