Journal
MATERIALS
Volume 13, Issue 13, Pages -Publisher
MDPI
DOI: 10.3390/ma13132969
Keywords
high strain rate; ZK60 alloy; mechanical properties; damping capacity; damping peak
Categories
Funding
- Guangxi Natural Science Foundation Project [2016GXNSFDA380008]
- Liuzhou Science and Technology Development Plan Project [2017BD20301]
Ask authors/readers for more resources
High strain rate rolling (HRSS) of a ZK60 magnesium alloy at 300 degrees C with a strain rate from 5 s(-1)to 25 s(-1)was used to research the effect of the rate on the mechanical properties and damping capacity of the ZK60 alloy. The results show that as the strain rate increases, the tensile strength decreases from 355 MPa at 25 s(-1)to 310 MPa at 5 s(-1). Two damping peaks (P1 and P2) are detected in the high strain rate rolled ZK60 alloys at different strain rates. The P1 peak appears at low temperatures and is caused by grain boundaries sliding. The P2 peak appears at high temperatures and is caused by recrystallization. As the strain rate increases from 5 to 20 s(-1), the dynamic recrystallization (DRX) volume percent rises and the dislocation density decreases, both of which cause the P1 peak to become more and more obvious, and activation energy rises. At the same time, the dislocation density decreases and leads to a decrease in the storage energy, which reduces the recrystallization driving force and shifts the P2 peak to high temperatures. When the strain rate reaches 20 and 25 s(-1), DRX occurs fully in the sheet, so the activation energy of the P1 peak and the temperature where the P2 peak appears are basically equal.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available