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Effect of Initial Microstructure Conditions on the Microstructure and Mechanical Properties of Hot Extruded Mg-6Nd-2Al Alloy

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Abstract

In the present paper, the effect of initial microstructure on the hot extruded Mg-6Nd-2Al alloy was carried out by microstructural observation and mechanical property testing. The results show that there are short rod-shaped Al11Nd3 phase, strip-shaped Mg12Nd phase and granular Al2Nd phase in the as-cast Mg-6Nd-2Al alloy after hot extrusion. The as-cast alloy is treated by solid solution and then hot extrusion, the granular Al2Nd phase can still be observed in the alloy, and the needle-shaped Al2Nd phase precipitates inside the α-Mg matrix. A typical (0001) texture and {01-10} prismatic surface texture appear in the as-cast alloy after hot extrusion, while in the solid-solution alloy after hot extrusion does not form an obvious preferred orientation. The ultimate tensile strength and the yield strength of the as-cast alloy after hot extrusion are higher, which are 271.2MPa and 247.8MPa, respectively. However, the elongation of the as-cast alloy after hot extrusion is lower, which is 15.3%.

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Acknowledgments

The authors gratefully acknowledge the financial support from the Heilongjiang Province Natural Science Foundation (No. E2018045).

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Correspondence to Lei Wang.

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Yu, C., Feng, Y., Zhang, J. et al. Effect of Initial Microstructure Conditions on the Microstructure and Mechanical Properties of Hot Extruded Mg-6Nd-2Al Alloy. J. of Materi Eng and Perform 31, 742–752 (2022). https://doi.org/10.1007/s11665-021-06184-3

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