CaMg $_{2}$ C14-Laves相在50-250 $^\circ$ C的塑性形变
Plastic deformation of the CaMg$_{2}$ C14-Laves phase from 50-250$^\circ$C
摘要：
金属间化合物相可以显著提高镁合金的抗蠕变性，将其应用范围扩展到更高的温度。然而，很少有人知道这些阶段在应用温度下，这通常是低于其宏观脆韧性转变温度的变形行为。因此，在本研究中，我们研究了在50 $^\circ$ C到250 $^\circ$ C的温度范围内，CaMg $_2$相的不同滑移系统的激活和锯齿屈服的发生。锯齿形流动的量随着温度的升高而减少，表明当CaMg $_{2}$相偏离化学计量时，溶质原子支配流动行为。
英文摘要：
Intermetallic phases can significantly improve the creep resistance of magnesium alloys, extending their use to higher temperatures. However, little is known about the deformation behaviour of these phases at application temperatures, which are commonly below their macroscopic brittle-to-ductile-transition temperature. In this study, we therefore investigate the activation of different slip systems of the CaMg$_2$ phase and the occurrence of serrated yielding in the temperature range from 50$^\circ$C to 250$^\circ$C. A decreasing amount of serrated flow with increasing temperature suggests that solute atoms govern the flow behaviour when the CaMg$_{2}$ phase is off-stoichiometric.
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