晶粒尺寸与析出相对AZ80镁合金力学性能的综合影响

Microstructure and mechanical properties of superplastic mould forging AZ80 wheel had been investigated under multi-constrained forming. Finer grains would be obtained with the strain amplitude increase resulting from the Z parameter increase under Zener-Hollomon relationship. The relationship between precipitate morphology, volume fraction and the hardness response is studied and the precipitation mechanism of lamellar discontinuous precipitates was detailly discussed under thermodynamic.