Influence of Carburization on Dynamic Impact Behavior of NiTiCu Alloy

The dynamic impact behavior of bare and carburized NiTiCu shape memory alloy was studied using a home-built impact testing system in this paper. The contact force and contact time between impactor and specimen at different impact energy were measured in real time by force sensor, and predicted formulae about parameters during impact process were presented. The results showed that the contact force and contact time of carburized specimens were less than these of bare specimens, and the absorbed energy of carburized specimens due to stress-induced martensitic transformation was higher than that of bare specimens. These results indicated that the carburization process could reduce contact force and material damage of NiTiCu alloy during impact process.