运用D实验设计优化电磁搅拌铸造A357-SiC纳米复合材料的力学性能(英文)
发布时间:2021-08-22 08:17
采用D实验优化设计(DODOE)方法,对A357-SiC纳米复合材料的电磁搅拌铸造工艺进行研究。以DX-7软件获得的9个随机实验设计方案为主要目标,在3种不同的频率(10、35和60 Hz)下制备不同SiC含量(0.5%、1.0%和1.5%,质量分数)的A357-SiC纳米复合材料。用扫描电镜和光学显微镜对其显微组织演变进行表征,并通过硬度和室温单轴拉伸试验对其力学性能进行研究。结果表明,SiC纳米颗粒的均匀分布使材料的显微组织由枝晶向非枝晶态演化,晶粒尺寸减小73.9%。此外,基于DODOE获得的屈服强度和极限抗拉强度的F值分别为44.80和179.64,表明该模型具有显著性,变量(SiC含量和搅拌频率)选取合适。结果表明,最佳搅拌频率为60 Hz,最佳SiC含量为1.5%(质量分数),在此条件下,A357-SiC纳米复合材料的屈服强度和极限抗拉强度分别为120和188 MPa,比铸态试样的分别提高57.7%和57.9%。
【文章来源】:Transactions of Nonferrous Metals Society of China. 2020,30(05)EISCICSCD
【文章页数】:12 页
【文章目录】:
1 Introduction
2 Experimental
2.1 Materials
2.2 Design of experiment
3 Results and discussion
3.1 Analysis of design of experiment
3.2 Metallurgical characterization
3.2.1 Effect of stirring frequency in ESC process
3.2.2 Effect of SiC content in ESC process
3.2.3 Contributions of different strengthening mechanisms
4 Conclusions
本文编号:3357373
【文章来源】:Transactions of Nonferrous Metals Society of China. 2020,30(05)EISCICSCD
【文章页数】:12 页
【文章目录】:
1 Introduction
2 Experimental
2.1 Materials
2.2 Design of experiment
3 Results and discussion
3.1 Analysis of design of experiment
3.2 Metallurgical characterization
3.2.1 Effect of stirring frequency in ESC process
3.2.2 Effect of SiC content in ESC process
3.2.3 Contributions of different strengthening mechanisms
4 Conclusions
本文编号:3357373
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