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
	2016-06
卷号	9 期号:6
关键词	powder thixoforming permanent mould cast SiCp/6061Al composite microstructure tensile properties strengthening mechanisms
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 alpha 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.
资助项目	Basic Scientific Fund of Gansu Universities[G2014-07] ; Program for New Century Excellent Talents in University of China[NCET-10-0023] ; Program for Hongliu Outstanding Talents of Lanzhou University of Technology[2012-03]
WOS研究方向	Materials Science
语种	英语
出版者	MDPI
WOS记录号	WOS:000378630600006
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33674]
专题	材料科学与工程学院机电工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Chen, Tijun
作者单位	Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R 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).