Hairul Arsyad, I.N.G. Wardana, Wahyono Suprapto, Anindito Purnowidodo
Effect of specimen size and grain size on deformation characteristic of aluminum under impact loading conditions at constant impact energy per unit area has been studied experimentally. The friction effect was minimized withoil lubricant. The result shows that there are two significant differences in deformation characteristics due to size effect. The first is deformation in the thickness cross section of the coarse grain size specimen was not uniform and showed clearly barreling effect compare to the fine grain sizes. The second is deformation at the edge of the specimen with fine grain sizes has smaller grain flow lines and more uniform than the specimens with coarse grain size. The significant difference is mainly attributed to the differences on the number of grain boundary that act as deformation barrier. The grain size, however, does not have significant effect on the circularitysince the specimen diameter is very large compare to the grain size. The circularity increases with increasing thickness of the initial specimen. © Research India Publications.
Hasanuddin University, Mechanical Engineering Department, 90245, South Sulawesi, Indonesia; Brawijaya University, Mechanical Engineering Department, Malang, 65145, Indonesia
