Enhancement of mechanical properties for Mg-9Li-1Zn alloy by accumulative roll bonding

Abstract

The microstructures and mechanical properties of LZ91 alloys by accumulative roll bonding (ARB) were firstly investigated. The results show that the cycle numbers of ARB process and preheating temperatures before ARB process have an impact on the microstructures and mechanical properties of LZ91 alloys. The microstructures of LZ91 sheets after ARB perform two main phases of α and β in the fibrous form. ARB process can drive more numbers of crystallographic planes for α and β phases in LZ91 alloys to proof the grain refinement after ARB. More cycle numbers of ARB on LZ91 sheets makes the fibrous microstructures finer and increases the mechanical properties such as hardness and ultimate tensile strength due to the mechanism of strain hardening and grain refinement.

Effect of single-pass large-strain tube pack-rolling on forming AZ61 alloy strip

“…19,20 Most of ARB was employed to refine the grains during Mg alloy rolling. [20][21][22] Saufan A et al 23 reported that 5 passes ARB was applied in Mg-9Li-1Zn which achieved grain refinement and strength increasing.…”