Grain Refinement in the Magnesium Alloy ZK60 During Multi-step Isothermal Forging

摘要

Transformations of hot-pressed partially recrystallized structure of the magnesium alloy ZK60 into ultrafine-grained one with the (sub)grain size of ～1 μm under multi-step isothermal forging were analyzed. The mechanisms of recrystallization, as well as the role of the processing temperature and second phases in the development of new grains are discussed.