ABSTRACT
Dynamic compression experiments were carried out on Mg–2.5Zn–4Y magnesium alloy containing long period stacking ordered phase (LPSO) to understand its deformation mechanism using ‘Split Hopkinson Pressure Bar’. High strain rates ranging from 700 to 2100 s−1 were applied along Extrusion Direction. The results demonstrate that maximum compression stress increases with increasing strain rate. In the mean the alloy shows a positive strain rate strengthening effect. The deformation mechanism of Mg–2.5Zn–4Y magnesium alloy with LPSO phase is mainly 〈c + a〉 pyramidal slip supplemented with deformation by extension twin in association with kinking of LPSO phase. The impact fracture surface of the investigated magnesium alloy suggested quasi-cleavage fracture.
Acknowledgement
The authors would like to acknowledge the financial support from High level innovation team of Liaoning Province (XLYC1908006). Innovation Talent Program in Science and Technology for Young and Middle-aged Scientists of Shenyang (No.RC.180111), Project of Liaoning Education Department (No. LQGD2019002 and LJGD2019004), Liaoning nature fund guidance plan (No. 2019-ZD-0210), and Liaoning Revitalization Talents Program (No. XLYC1807021 and 1907007).
Disclosure statement
No potential conflict of interest was reported by the author(s).