Transactions of Materials and Heat Treatment

Title：Forging process and microstructure properties of Mg-based automotive battery alloy

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ClassificationCode：TG376.9

year,vol(issue):pagenumber：2021,46(3):15-20

Abstract：

The multi-directional isothermal forging process tests of Mg1.8Al0.2Ni Mg-based battery alloy were carried out at different temperatures, and the microstructure, corrosion resistance property and charge-discharge cycle stability were compared and analyzed with the alloy before forging. The results show that the multi-directional isothermal forging significantly refines the grains of alloy and improves the corrosion resistance property and charge-discharge cycle stability of alloy. With the increasing of forging temperature from 350 ℃ to 450 ℃, the internal microstructure of Mg1.8Al0.2Ni Mg-based battery alloy is first refined and then coarsened, and the corrosion resistance property and the charge-discharge cycle stability of alloy are first increased and then decreased. Compared with the alloy before forging, the corrosion potential of Mg1.8Al0.2Ni Mg-based battery alloy after multi-directional isothermal forging at 350 ℃ is positively shifted by 32 mV, the retention rate of discharge capacity increases by 21% after twenty charge-discharge cycles, and the corrosion resistance property and the charge-discharge cycle stability of alloy are significantly improved.

Funds：

天津市科学技术委员会科研课题(18JCTPJC58500)

李振兴（1988-）,男，硕士，讲师 E-mail：li_zhenxing_love@126.com

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