Current research progress in grain refinement of cast magnesium alloys: A review article

Analysis of Crystallisation Process of Cast Magnesium Alloys Based on Thermal Derivative Analysis / Analiza Procesu Krystalizacji Odlewniczych Stopów Magnezu W Oparciu O Analizę Termicznoderywacyjną

“…It is also known that the total lifecycle cost of a magnesium part is lower than that of one made from other materials. Hence, the development of new magnesium-based alloys that have better properties and formability could enable greater cost reduction [4][5][6].…”

“…An increase in the solid fraction at coherency may improve the casting properties of the alloy and reduce casting defects. The DCP is a fundamental characteristic of as-cast alloys, because it indicates the transition from mass to interdendritic feeding during crystallisation [1,4,7]. Casting defects, such as macrosegregation, shrinkage, porosity and hot tearing begins below the DCP [4,[8][9][10].…”

Effect of Ultrasonic Treatment in the Static and Dynamic Mechanical Behavior of AZ91D Mg Alloy

“…The microstructural refinement of Mg alloys can be performed by two basic approaches: (i) thermomechanical treatment through plastic deformation in which dynamic recrystallization leads to the formation of small equiaxed grains [18]; (ii) casting processing where two different routes can be followed: chemical [19] or physical [20][21][22] treatment. An example of physical processing is the application of ultrasound treatment [23].…”

Effect of Second Phase Particles on Grain Growth for Nanocrystalline AZ31 Mg Alloy by Phase Field Methods

“…The moderate refinement of grains is an effective means to enhance the comprehensive properties of materials, and it is also the most important method to control the microstructure of materials, which has taken a lot of attentions of researchers [1,2] . Dispersively distributed hard particles are usually used to make the grains smaller in matrix structure, due to their pinning force on grain boundaries to prevent the grain growth.…”