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논문 기본 정보

자료유형
학술저널
저자정보
Dongdong Gu (Chongqing University) Jian Peng (Chongqing University) Jiawen Wang (Chongqing University) Fusheng Pan (Chongqing University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.6
발행연도
2021.1
수록면
1,483 - 1,492 (10page)

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초록· 키워드

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The evolution of microstructure and mechanical properties of the dilute Mg–Gd alloy with Mn modification were investigatedsystematically in this paper. The results show that the combination of Mn and different processing states could adjust thesolid solubility of Gd in the Mg matrix, thereby changing the morphology of the second phases and improving the propertiesof the alloy. With the addition of 0.8 wt% Mn into the Mg–4Gd alloy, the atomic utilization ratio of Gd atoms decreasesfrom 61.5 to 51.8% during the water-cooling casting process, but it increases from 73.8 to 81.0% during homogenizationtreatment and increases from 72.3 to 84.1% during hot extrusion. Thus, the mean diameter of granular phases of the Mg–4Gd alloy is larger than that of Mg–4Gd–0.8Mn alloy after the isothermal heat treatment. The Mn addition has little effecton the Hall–Petch constant KYand KHof Mg–4Gd alloy, but improves the σ0 value significantly due to the increase of theatomic utilization ratio of Gd atoms. Mn element can improve the mechanical properties of Mg–4Gd alloy, and the increaseof yield strength and ductility of as-extruded Mg–4Gd–0.8Mn alloy is mainly attributed to grain refinement and the decreaseof the texture intensity.

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