当前位置: X-MOL 学术J. Alloys Compd. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Microstructure and mechanical properties of as-cast Mg-Sn-Zn-Y alloys
Journal of Alloys and Compounds ( IF 6.2 ) Pub Date : 2018-04-01 , DOI: 10.1016/j.jallcom.2017.09.192
Yu'an Chen , Yi Wang , Junjie Gao

Abstract The effects of yttrium(Y) addition on the microstructure and mechanical properties of the as-cast Mg-5Sn-3Zn have been investigated. Results indicate that the addition of Y to Mg-5Sn-3Zn not only refines the grains but also promotes the precipitation of MgSnY phase with high stability. An increase addition of Y form 0.2–0.8 wt% increases the amount and size of MgSnY which would influence the mechanical properties of the as-cast alloys. The precipitation behavior of Mg2Sn and MgZn2 was also discussed. It was found that the MgZn2 phase is tend to precipitates attach to the Mg2Sn phase because the mismatch degree between them is relatively low, which have some guiding role in increase the amount of MgZn2 by Sn addition to enhance the performance of Mg-Sn-Zn alloys. In addition, Y to the Mg-5Sn-3Zn alloy general improves the mechanical properties but over does of Y would make it decrease, especially the elongation, which is affected by the grains and precipitates, improved significantly. The addition of 0.5 wt% Y gives the alloy favorable properties that the ultimate tensile strength reaches to 229 MPa and the elongation peaks at 19.2% at room temperature.

中文翻译:

铸态Mg-Sn-Zn-Y合金的显微组织和力学性能

摘要 研究了钇(Y)的添加对铸态Mg-5Sn-3Zn组织和力学性能的影响。结果表明,在Mg-5Sn-3Zn中加入Y不仅细化了晶粒,而且促进了具有高稳定性的MgSnY相的析出。Y 的添加量增加 0.2-0.8 wt% 会增加 MgSnY 的数量和尺寸,这会影响铸态合金的机械性能。还讨论了 Mg2Sn 和 MgZn2 的析出行为。发现由于MgZn2相之间的失配度相对较低,MgZn2相倾向于沉淀物附着在Mg2Sn相上,这对通过添加Sn增加MgZn2的量以提高Mg-Sn-Zn的性能具有一定的指导作用合金。此外,Y对Mg-5Sn-3Zn合金的力学性能普遍提高,但过量的Y会使其降低,特别是受晶粒和析出物影响的伸长率显着提高。添加 0.5 wt% Y 使合金具有良好的性能,在室温下极限拉伸强度达到 229 MPa,伸长率峰值为 19.2%。
更新日期:2018-04-01
down
wechat
bug