Development of heat-resistant magnesium alloys with high strength by utilizing Laves phases

通过对镁铝钙压铸合金的详细观察，建立了蠕变过程中位错运动的描述。在压铸过程中，位错被引入到原始α颗粒内部。位错的基段在应力的作用下能够在基面上弯曲并滑动，蠕变过程中位错的拐点在爬升的帮助下跟随基段。Laves相可以降低位错的攀移速度。

A description of dislocation movements during creep has been developed through a detailed TEM observation for the Mg-Al-Ca die-cast alloy. Dislocations are introduced within the primary α grain interior in the die-cast process. The basal segments of dislocations are able to bow out and glide on the basal planes under the influence of a stress, and the jogs follow the basal segments with the help of climb during creep. The Laves phase can decrease the climb velocity of dislocations.