Effects of the β1′ precipitates on mechanical and damping properties of ZK60 magnesium alloy

A Z new approach to improve the damping capacity and mechanical properties of ZK60 magnesium alloy at the same time is discovered by introducing the beta(1)' (MgZn2) precipitates. The beta(1)' precipitates are formed in the alloy experienced solution treatment and subsequent aging at 140 degrees C for 18 h in this study. The synchronous improvement in mechanical and damping properties of the alloy is mainly due to the coherent orientation relationships between the beta(1)' phase and the a-Mg matrix, and the shearing or bypassing of dislocations on the beta(1)' precipitates depending on their sizes and spacing. The modified Granato-Lucke (G-L) model is presented in this work to analyze the favorable damping capacity of the as-aged ZK60 alloy and the interaction between the beta(1)' precipitates and the mobile dislocations is a new source of energy-dissipation.

Automated summary

By introducing beta(1)' (MgZn2) precipitates through solution treatment and subsequent aging, a new approach has been discovered to improve the damping capacity and mechanical properties of ZK60 magnesium alloy. The coherent orientation relationships between the beta(1)' phase and the a-Mg matrix, as well as the shearing or bypassing of dislocations on the beta(1)' precipitates depending on their sizes and spacing, contribute to the synchronous improvement in mechanical and damping properties of the alloy. The modified Granato-Lucke (G-L) model presented in this work analyzes the favorable damping capacity of the aged ZK60 alloy, where the interaction between the beta(1)' precipitates and the mobile dislocations serves as a new source of energy dissipation.