| Autor: |
Fei-yu He, Wen-xin Hu, Li-juan Liu, Shao-bo Ma, Wei He |
| Předmět: |
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| Zdroj: |
China Foundry; Jul2023, Vol. 20 Issue 4, p299-306, 8p |
| Abstrakt: |
The effect of 0.5wt.% Zn addition on the microstructure and mechanical properties of Mg-3Y-2Nd0.5Zr (WE32) alloy was investigated. The results indicate that WE32-0.5Zn alloy takes 48 h to reach peak hardness after solid solution treatment at 525 °C and aging at 200 °C, 10 h earlier than WE32 alloy, which implies an accelerated aging precipitation kinetics owing to the addition of 0.5wt.% Zn. A large quantity of finerod and rectangular block-like Zn-Zr precipitates in the α-Mg matrix are formed in the WE32-0.5Zn alloy, and numerous needle-like β1 phases are distributed at both ends of the Zn-Zr precipitates at peak-aged condition. In peak-aged condition, the ultimate tensile strength considerably increases from 263.2 MPa (WE32) to 309.6 MPa (WE32-0.5Zn), and the elongation dramatically increases from 4.3% (WE32) to 8.9% (WE32-0.5Zn). The β' and β1 phases are the main precipitates of the WE32-0.5Zn alloy peak-aged at 200 °C. The β' and β1 phases easily nucleate at the Zn-Zr precipitates, and the β1 phases are particularly likely to nucleate and grow at the interface between the two ends of the Zn-Zr precipitates, which accelerates aging precipitation kinetics and leads to a shorter time to achieve peak aging. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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