Effect of heat treatment on the microstructure and properties of in-situ Mg2Si reinforced hypereutectic Al-18%Si matrix composites

doi:10.1088/2053-1591/abaea2

	Effect of heat treatment on the microstructure and properties of in-situ Mg2Si reinforced hypereutectic Al-18%Si matrix composites
	Xu,Kai 2; Wang,Jianjun 1; Zhang,Shuquan 3
刊名	Materials Research Express
	2020-08-01
卷号	7
关键词	heat treatment in-situ Mg2Si hypereutectic Al-18%Si matrix composites microstructure properties
DOI	10.1088/2053-1591/abaea2
英文摘要	Abstract The in situ preparation of particle reinforced metal matrix composites (PRMMCs) can prevent the particle surface from pollution, improve the wettability of particles and matrix metals, and reduce the production cost of composites. In this paper, in situ Mg2Si reinforced hypereutectic Al-18%Si matrix composites were prepared by adding an appropriate amount of magnesium. However, the Mg2Si enhanced phase often has developed dendrites, which are easy to cause stress concentration and cut apart the matrix, resulting in the decrease of the mechanical properties of the material. Therefore, in this study, necessary solution treatment and aging treatment were carried out, and the effect of heat treatment on the microstructure and properties of the prepared composites was discussed. The results showed that the in situ Mg2Si reinforced Al-18%Si matrix composites with an ideal microstructure could be prepared by adding 4% Mg. After solution treatment at 545 °C for 8 h and aging treatment at 170?±?2 °C for 8 h, the coarse dendrites of Mg2Si were broke and granulated, which improved the strength, hardness and wear resistance of the composites. Compared with the common as cast hypereutectic Al-18%Si alloy, the hardness and the strength of the prepared composites were increased by 30% and 46%, respectively. Besides, the granulation process of the in situ Mg2Si phase was explained with the Gibbs-Thomson theorem in this paper.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:MRX_7_8_086515
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127379]
专题	中国科学院合肥物质科学研究院
作者单位	1.College of Mechanical Engineering, Anhui Technical College of Mechanical and Electrical Engineering, Wuhu 241000, People’s Republic of China 2.School of Aeronautic and Materials, Anhui Technical College of Mechanical and Electrical Engineering, Wuhu 241000, People’s Republic of China 3.Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 341000, People’s Republic of China
推荐引用方式 GB/T 7714	Xu,Kai,Wang,Jianjun,Zhang,Shuquan. Effect of heat treatment on the microstructure and properties of in-situ Mg2Si reinforced hypereutectic Al-18%Si matrix composites[J]. Materials Research Express,2020,7.
APA	Xu,Kai,Wang,Jianjun,&Zhang,Shuquan.(2020).Effect of heat treatment on the microstructure and properties of in-situ Mg2Si reinforced hypereutectic Al-18%Si matrix composites.Materials Research Express,7.
MLA	Xu,Kai,et al."Effect of heat treatment on the microstructure and properties of in-situ Mg2Si reinforced hypereutectic Al-18%Si matrix composites".Materials Research Express 7(2020).