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| Study on Microstructure and Properties of the Broadloom AZ31B Magnesium Alloy Roll-casting Plate |
| HUANG Zhiquan1** HUANG Qingxue1 MA Lifeng1,2 LIN Jinbao1 PANG Zhining1 |
1. College of Mechanical Engineering, Heavy Machinery Engineering Research Center of Education Ministry,
Taiyuan University of Science and Technology, Taiyuan 030024
2. Superplastic and Plastic Research Institute, Jilin University, Changchun 130025 |
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Cite this article:
HUANG Zhiquan,HUANG Qingxue, MA Lifeng,LIN Jinbao, PANG Zhining. Study on Microstructure and Properties of the Broadloom AZ31B Magnesium Alloy Roll-casting Plate. Chinese Journal of Materials Research, 2013, 27(3): 292-298.
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Abstract The microstructure of broadloom AZ31B magnesium alloy roll-casting plate and its influence on the edge crack and mechanical properties of the plate were studied by using metallographic observation, SEM and mechanical property testing experiment. The results show that: the plate organization is mainly composed of α -Mg matrix, β -Mg17Al12 phase and α + β divorced eutectic, showing dendritic morphology; In surface and edge of the plate, β -Mg17Al12 phase is mainly distributed at the grain boundary and the density is bigger, formed net-shape; In center and central of the plate, spherical β -Mg17Al12 phase is dispersed in α-Mg matrix, formed lamellar-shape; The main reason for the edge crack in the cast-rolling process is in the slab edge interdendritic low-melting eutectic phase and β -Mg17Al12 phase of grain boundary which are easy to be crack source, and extend outward along the crystal; The tensile specimen showes brittle cleavage fracture characteristics, and its mechanical property is obvious anisotropy.
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Received: 07 March 2013
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| Fund: *Supported by National Natural Science Foundation of China Nos.51105264 and 51204117, National Key Basic Research Program of China No.2011CB612204, and the Graduate Science and Technology Innovation Project of Taiyuan University of Science and Technology No.20125002. |
| About author: **To whom correspondence should be addressed, Tel: (0351)6993331, E-mail: huangzhipeng607@163.com |
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