We can obviously find:the internal organization of rapid solidification material is smaller and grain boundary is cleaner with fewer precipitates.
The grain size of rapid solidification aluminum is 3-10μm, while the castings is 80-300μm.The refinement of grain could effectively enhance the comprehensive mechanical properties of material.
From above pictures,we can learn that Baienwei superhard aluminum alloys have obvious dimples.Dimple is one of the most obvious features to measure the strength of material.What’s more,the thick-walled tubes present more ductile fracture features than thin-walled tubes.