In this work, the effect of a novel TiBor grain refiner on the hot tearing behavior of the AZ91D magnesium alloy was quantitatively studied. The relationship between the grain refinement level, the alloy's cooling rate and the in-situ force evolution during casting solidification was investigated...
The hot tearing behavior of a newly developed NZ30K Mg alloy (Mg-3.0Nd-0.2Zn-Zr, wt.%) was studied under progressive solidification using various mold temperature distributions and constraint lengths. Of these, a homogeneous mold temperature distribution is found to be the best option to avoid ...
Hot tearingGrain refinementHot tearing during solidification is frequently observed while casting alloys with a long freezing range (such as the AZ91D magnesium alloy) into molds with complex geometries and varying section thicknesses. Typically, hot tearing may be reduced or eliminated by manipulating...
hot tearingMagnesium AlloyAZ91Dpermanent moldmold temperatureyield strengthmicro structureThis research focused primarily on studying the effect of mold temperature on the hot tearing susceptibility of permanent mold cast (PMC) AZ91D magnesium alloy. The results suggest that increasing the mold temperature...
Hot tearingGrain refinementThe AZ91D magnesium alloy is a popular casting alloy used for diverse automotive applications, despite its high susceptibility to hot tearing during casting solidification. In the metalcasting industry, hot tearing is manipulated via cooling rate, alloy compositio...
magnesium alloy, AZ91D, TIG welding, hot cracking, liquation, fracturePlates of 35 mm in thickness were extracted from an AZ91D ingot and then butt joints of the plates were produced using tungsten inert gas (TIG) welding method. The TIG arc was also used to deposit welding beads on some...
The hot deformation behavior of as-cast AZ91D magnesium alloy has been investigated by using the processing map and the standard kinetic analysis based on hot compression tests. The compression tests were conducted in the temperature range of 220–380°C and at a strain rate from 0.001 to 1s1...
Corrosion behavior of a new hot work die seel containing high Co in liquid magnesium alloy AZ91D was analyzed by SEM and energy spectrum analysis.The results show that a chemical reaction occurred between the steel and liquid magnesium alloy forming a corrosion layer.On the earlier stage of the...
Hot tearingGrain refinementThe AZ91D magnesium alloy is a popular casting alloy used for diverse automotive applications, despite its high susceptibility to hot tearing during casting solidification. In the metalcasting industry, hot tearing is manipulated via cooling rate, alloy composition or mold ...
The weld of the magnesium alloy displays a high cracking susceptibility. The cracks are mainly formed in the arc crater at the end of the weld. These cracks propagate along the a-Mg grain boundary, and they belong to the solidification cracking. These solidification cracks are resulted by the...