A comparative study on permanent mold cast and powder thixoforming 6061 aluminum alloy and Sicp/6061Al composite: Microstructures and mechanical properties

doi:10.3390/ma9060407

	A comparative study on permanent mold cast and powder thixoforming 6061 aluminum alloy and Sicp/6061Al composite: Microstructures and mechanical properties
	Zhang, Xuezheng; Chen, Tijun; Qin, He; Wang, Chong
刊名	Materials
	2016-05-24
卷号	9 期号:6
关键词	Eutectics Microstructure Molds Particle reinforced composites Silicon alloys Silicon carbide Tensile properties Tensile strength Textures Yield stress 6061 aluminum alloys Mechanical characterizations Microstructures and mechanical properties Reinforcing particles Solidified structures Strengthening mechanisms Thixo-forming Ultimate tensile strength
ISSN号	1996-1944
DOI	10.3390/ma9060407
英文摘要	Microstructural and mechanical characterization of 10 vol% SiC particles (SiCp) reinforced 6061 Al-based composite fabricated by powder thixoforming (PTF) was investigated in comparison with the PTF and permanent mold cast (PMC) 6061 monolithic alloys. The results reveal that the microstructure of the PMC alloy consists of coarse and equiaxed α dendrites and interdendritic net-like eutectic phases. However, the microstructure of the PTF composite, similar to that of the PTF alloy, consists of near-spheroidal primary particles and intergranular secondarily solidified structures except SiCp, which are distributed in the secondarily solidified structures. The eutectics amount in the PTF materials is distinctly lower than that in the PMC alloy, and the microstructures of the former materials are quite compact while that of the latter alloy is porous. Therefore, the PTF alloy shows better tensile properties than the PMC alloy. Owing to the existence of the SiC reinforcing particles, the PTF composite attains an ultimate tensile strength and yield strength of 230 MPa and 128 MPa, representing an enhancement of 27.8% and 29.3% than those (180 MPa and 99 MPa) of the PTF alloy. A modified model based on three strengthening mechanisms was proposed to calculate the yield strength of the PTF composite. The obtained theoretical results were quite consistent with the experimental data.
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
语种	英语
出版者	MDPI AG, Postfach, Basel, CH-4005, Switzerland
WOS记录号	WOS:000378630600006
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/112578]
专题	材料科学与工程学院机电工程学院
作者单位	State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhang, Xuezheng,Chen, Tijun,Qin, He,et al. A comparative study on permanent mold cast and powder thixoforming 6061 aluminum alloy and Sicp/6061Al composite: Microstructures and mechanical properties[J]. Materials,2016,9(6).
APA	Zhang, Xuezheng,Chen, Tijun,Qin, He,&Wang, Chong.(2016).A comparative study on permanent mold cast and powder thixoforming 6061 aluminum alloy and Sicp/6061Al composite: Microstructures and mechanical properties.Materials,9(6).
MLA	Zhang, Xuezheng,et al."A comparative study on permanent mold cast and powder thixoforming 6061 aluminum alloy and Sicp/6061Al composite: Microstructures and mechanical properties".Materials 9.6(2016).