本文研究了Mg-Y-Nd-Zr合金在温度300-500℃和应变速率0.001-1s-1间的高温变形行为，利用动态材料模型构建了热加工图，结合组织观察结果认为该合金在450-500℃、应变速率大约为0.01s-1条件下发生动态再结晶；而温度高于450℃、应变速率大约0.005s-1时，材料发生界面开裂；温度低于350℃、应变速率约为0.01s-1时，材料在变形过程中由于机械孪生导致开裂；温度为450℃左右、应变速率高于0.5s-1时，材料在变形过程中发生剪切开裂。
The deformation behaviour of Mg-Y-Nd-Zr alloy at temperatures of 300-500℃ and strain rates of 0.001-1s-1 has been studied by compressive tests. Processing map of this alloy was established on the basis of Dynamic Material Model; it is suggested that, with microstructural observation, the processing map of this alloy could be characterized as the following four domains: First, dynamic recrystallization (DRX) domain at 450-500℃ and about 0.01s-1. Second, boundary cracking domain at temperatures higher than 450℃ and strain rates of about 0.005s-1. Third, flow instability domain probably due to mechanical twinning at temperature lower than 350℃ and strain rate of about 0.01s-1. Last, shearing fracture at about 450℃ and strain rates higher than 0.5s-1.
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