Forming Limit Diagram of Magnesium Alloy ZK60 at Elevated Temperature
The forming limit diagram of magnesium alloy ZK60 was developed with Hill’s instability criterion and M-K analysis. The relationship of forming limit with stain path, temperature and the thickness irregular coefficient were analyzed. The results show that the forming limit of ZK60 magnesium alloy increased little with the rising of strain ratio, but influenced greatly by the failure definition , and forming limit of is increased with the rising of temperature and thickness irregular coefficient, the most suitable value of f0 is 0.99, the fracture occur on the grain boundaries with significant cavities formation.
H. W. Liu et al., "Forming Limit Diagram of Magnesium Alloy ZK60 at Elevated Temperature", Advanced Materials Research, Vols. 308-310, pp. 2442-2445, 2011