Comparison Study on Mechanical Properties Single Step and Three Step Artificial Aging on Duralium

Duralium is kind of non-ferro alloy that used widely in industrial. That caused its properties such as mild, high ductility, and resistance from corrosion. This study aimed to know mechanical properties of duralium on single step and three step articial aging process. Mechanical properties that discussed in this study focused on toughness value, tensile strength, and microstructure of duralium. Toughness value of single step artificial aging was 0.082 joule/mm2, and toughness value of three step artificial aging was 0,0721 joule/mm2. Duralium tensile strength of single step artificial aging was 32.36 kgf/mm<^>2, and duralium tensile strength of three step artificial aging was 32,70 kgf/mm<^>2. Based on microstructure photo of duralium of single step artificial aging showed that precipitate (theta) was not spreading evenly indicated by black spot which increasing the toughness of material. While microstructure photo of duralium that treated by three step artificial aging showed that it had more precipitate (theta) spread evenly compared with duralium that treated by single step artificial aging.