Microstructure evolution of as-cast AlN/AZ91 composites and room temperature compressive properties
Microstructure evolution of as-cast AlN/AZ91 composites and room temperature compressive properties
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铸态 AlN/AZ91 复合材料的微观结构演变和室温压缩性能
DOI：
10.1016/j.jallcom.2018.10.041
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发表时间：
2019-02
影响因子：
6.2
通讯作者：
Liu Feng
中科院分区：
文献类型：
--
作者：
Yang Changlin;Zhang Bin;Zhao Dongchen;Wang Xiaobo;Sun Yunxia;Xu Xinyue;Liu Feng
The microstructures of as-cast AlN/AZ91 composites prepared by different in-situ nitridation reaction times are characterized. Increasing nitridation reaction times resulted in morphological changes of the primary α-Mg phase from coarse dendritic structures to fine cellular structures, the volume fraction decrease of eutectic β-Mg17Al12phase, and the eutectic structure transformation from partial divorced eutectic to fully divorced eutectic. During the room temperature compression of as-cast AlN/AZ91 composites, the (0002) basal plane texture perpendicular to the compression direction was weakened effectively, and compression strength and plasticity were simultaneously improved compared with as-cast AZ91 alloy. When the nitridation reaction time is 2 h, i.e. the volume fraction of in-situ AlN particles is 1.5%, the compressive yield strength of 110 ± 2 MPa, the ultimate compressive strength of 371 ± 8 MPa and the compressive fraction elongation of 22.1 ± 0.4% are achieved in the in-situ AlN/AZ91 composites.
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