Microstructure Evolution and Mechanical Properties of Mg-Gd-Y-Zn-Zr Alloy during Compression

Abstract:

The compression behavior and mechanical properties of the Mg-13Gd-4Y-2Zn-0.5Zr (wt.%) alloy filled with intragranular long-period stacking ordered (LPSO) phases at different temperatures were investigated. The results showed that the higher the compression temperature, the smaller the plastic strain that the grains withstand. The grains changed from equiaxed to flat strips when compressed at 350°C, and the morphology of the grains did not change at 450°C. Due to the existence of DRX grains, compression at 450 °C didn’t cause large-angle kink, but the kink angle at 350°C was very large. DRX grains only appeared at the grain boundaries and around the intergranular LPSO phase at the beginning of compression, and only appear at the kink bands (KBs) after the lamellar LPSO phases begin to kink. DRX grains gradually increased with the KBs increasing.

• Periodical: Materials Science Forum (Volume 1035)
• Pages: 278-285
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1035.278
• Online since: June 2021
• Authors: Lei Chen Jia, Jian Min Yu*, Guo Qin Wu, Wen Long Xu, Yong Gang Tian, Zhi Min Zhang
• Keywords: Compress, Dynamic Recrystallization (DRX), Intragranular LPSO, Mg-Gd-Y-Zn-Zr

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