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Microstructure and mechanical properties of Mg-Al-based alloy modified with cerium

机译：铈改性Mg-Al基合金的组织和力学性能

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摘要

Mg_(90)Al_(10-x)Ce_x with x=0,1,3 and 5 (at%) have been prepared by copper mold casting and the influence of Ce on the microstructure and mechanical properties have been investigated. The addition of 1% Ce decreases the volume fraction of the γ-Mg_(17)Al_(12) phase and with the further increase of Ce to 3% and 5%, the γ-Mg_(17)Al_(12) intermetallic disappears completely with the formation of the Al_(11)Ce_3 and Al_2Ce intermetallic phases. The room temperature compression tests show that Ce addition significantly improves the room temperature mechanical properties. For example, the alloy with 5% Ce displays a strength of 448 MPa compared to 318 MPa of the binary Ce-free alloy along with appreciable plasticity of about 9%. This improvement is due to grain refinement as well as to the precipitation of the Al_(11)Ce_3 and Al_2Ce strengthening phases.
机译：通过铜铸模制备了Mg_（90）Al_（10-x）Ce_x，其中x = 0,1,3和5（at％），并研究了Ce对显微组织和力学性能的影响。添加1％Ce会降低γ-Mg_（17）Al_（12）相的体积分数，并且随着Ce的进一步增加至3％和5％，γ-Mg_（17）Al_（12）金属间化合物消失完全形成了Al_（11）Ce_3和Al_2Ce金属间相。室温压缩试验表明，铈的添加显着改善了室温机械性能。例如，与二元无铈合金的318 MPa相比，具有5％Ce的合金的强度为448 MPa，可塑性约为9％。这种改善归因于晶粒细化以及Al_（11）Ce_3和Al_2Ce强化相的析出。

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