Re-aging behavior of Cu-15Ni-8Sn alloy pretreated by dynamic strain aging

摘要

The microstructure and subsequent re-aging behavior of Cu-15Ni-8Sn alloy pre-deformed with dynamic strain aging (DSA) were investigated. The results show that DSA has an inhibitory effect on spinodal decomposition and result in the segregation and clustering of Sn and Ni, and eventually leads to the precipitation of Ni3Sn. DSA pre-treatment can significantly shorten the peak aging time of re-aging process since the precipitation of the strengthening phases grow directly from the dynamically precipitated nanoparticles in the previous DSA without time-consuming spinodal decomposition and nucleation.