中文摘要：

以便与优异机械性质获得好微观结构的镁合金， AZ61 合金被磨擦处理促使处理(FSP ) 与快速的热结合了水池。它与平均尺寸被发现那极其细小颗粒的微观结构不到 300 nm 在结果的 AZ61 合金被观察。极其细小的区域的吝啬的 microhardness 到达 Hv120-130，比 AZ61 的高的 two times 底层。所有这些结果清楚地在冷却的率下面表明那在有优异机械性质的 AZ61 合金的足够高的、极其细小的结构能被一通行证 FSP 经由动态再结晶生产。

英文摘要：

In order to obtain fine-microstructure magnesium alloys with superior mechanical properties, AZ61 alloy was processed by friction stir processing（FSP） combined with rapid heat sink. It is found that ultrafine-grained microstructure with average size less than 300 nm is observed in the resultant AZ61 alloy. The mean microhardness of the ultra-fine region reaches Hv 120-130, two times higher than that of AZ61 substrate. All these results demonstrate clearly that under a cooling rate high enough, ultra-free structure in AZ61 alloy with superior mechanical properties can be produced by one pass FSP via dynamic recrystallization.