Improvement of Microstructure, Mechanical Property and Corrosion Resistance of Mg?9Li?3Al?1Ca Alloy Through Centrifugal Casting

Zhenduo Ma; Qiang Peng; Guobing Wei; Yan Yang; Tiancai Xu; Weidong Xie; Gang Liu; Xiaodong Peng

doi:10.1007/s12540-020-00690-0

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자료유형: 학술저널

저자정보: Zhenduo Ma (Chongqing University) Qiang Peng (Chongqing University) Guobing Wei (Chongqing University) Yan Yang (Chongqing University) Tiancai Xu (Chongqing University) Weidong Xie (Chongqing University) Gang Liu (Nanyang Institute of Technology) Xiaodong Peng (Chongqing University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.11

발행연도: 2021.11

수록면: 4,498 - 4,509 (12page)

DOI: 10.1007/s12540-020-00690-0

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The microstructure, mechanical property and corrosion behavior of gravity casting and centrifugal casting Mg?9Li?3Al?1Ca alloy were investigated. The results indicate that the Mg?9Li?3Al?1Ca alloy is mainly composed of α-Mg phases, β-Liphases and Al2Caphases. After centrifugal casting, the blocky and elongated α-Mg phases of the gravity casting alloy canbe refined and spheroidized. Meanwhile, the amount of α-Mg and AlLi phases increases, however, the number of Al2Caphases decreases. Besides, a strong texture of β-Li phase on the (200) plane can be formed. The microstructure refinementand the decrease of Al2Caphases lead to the improvement of comprehensive property. The property of centrifugal alloyshas gradient along radius direction because the strength of centrifugal force varies with the centrifugal radius. The centrifugalcasting Mg?9Li?3Al?1Ca alloy at outside exhibits excellent comprehensive properties. The ultimate tensile strengthand elongation of centrifugal casting alloy achieve the value of 198.3 MPa and 6.0%, corresponding to 83.6% and 300.0%increments compared with gravity casting ones, respectively. The corrosion current also decreases to 89.4 μA/cm2, whichattributes to the weakening of galvanic corrosion attributing to the decrease of number of Al2Caphases and the transformationof corrosion pattern caused by grain refinement.

#Mg?9Li?3Al?1Ca alloy #Centrifugal casting #Microstructure #Mechanical property #Corrosion resistance

참고문헌 (31)

참고문헌 신청

K. K. Alaneme / 2017 / Enhancing plastic deformability of Mg and its alloys—a review of traditional and nascent developments / J. Magnes. Alloys 5:460~475

E. Cerri / 2017 / Microstructure evolution and mechanical properties of hot deformed Mg9Al1Zn samples containing a friction stir processed zone / J. Magnes. Alloys 5:388~403

Z. Zhao / 2017 / Infuence of Al and Si additions on the microstructure and mechanical properties of Mg-4Li alloys / Mater. Sci. Eng. A 702:206~217

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J. T. Kim / 2016 / Effect of Ca addition on the plastic deformation behavior of extruded Mg-11Li-3Al-1Sn0.4Mn alloy / J. Alloys Compd. 687:821~826

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