将铝-硅合金加入到AZ91D镁合金中,制备了原位合成Mg2Si/AZ91D复合材料,并研究了添加钙和锶对于复合材料铸态组织和力学性能的影响.结果表明:硅的加入在AZ91D镁合金中生成了高熔点、高硬度的Mg2Si强化相,但尺寸较大;元素钙和锶的综合作用可以显著细化复合材料基体的铸态组织,同时还可以明显改善Mg2Si的形态和分布,提高复合材料的强度.
In-situ formed Mg2Si/AZ91D composites were fabricated by adding Al-Si alloy into the AZ91D magnesium alloy. The effects of calcium and strontium on the as-cast microstructure and mechanical properties of composites were investigated. The results indicate that adding Si to AZ91D magnesium alloy could form Mg2Si strengthening phase of large size with high melting point and high hardness. The combined addition of calcium and strontium refined the as-cast microstructure of composites significantly, and also improved the morphology of Mg2 Si particles, so the mechanical properties of composites were increased.
参考文献
| [1] | Aghion E.;Bronfin B. .Magnesium Alloys Development towards the 21~(st) Century[J].Materials Science Forum,2000(0):19-28. |
| [2] | 刘楚明,刘子娟,朱秀荣,周海涛.镁及镁合金动态再结晶研究进展[J].中国有色金属学报,2006(01):1-12. |
| [3] | 陈晓,傅高升,钱匡武,王连登.原位反应自生MgO/Mg2Si增强镁基复合材料的热力学和动力学研究[J].铸造技术,2003(04):321-323. |
| [4] | 陈志彦,李文芳,尧建刚,彭继华.Al2O3-SiO2/AZ91D镁基复合材料制备及界面反应机理研究[J].铸造,2008(01):25-28. |
| [5] | 胡勇,闫洪,陈国香.原位生成Mg2Si/AM60复合材料的热力学与动力学分析[J].特种铸造及有色合金,2008(03):239-241. |
| [6] | G. Y. Yuan;Z. L. Liu;Q. D. Wang .Microstructure refinement of Mg-Al-Zn-Si alloys[J].Materials Letters,2002(1/2):53-58. |
| [7] | 廖恒成,丁毅,孙国雄.锶变质近共晶Al-Si合金力学性能与枝晶α数量之间的相关性[J].铸造,2002(03):148-152. |
| [8] | 廖恒成,丁毅,孙国雄.Sr对Al-Si-Mg铸造合金中Mg2Si相结晶行为影响的研究[J].铸造,2002(02):80-84. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%