Effects of Mold Temperature on the Microstructure and Tensile Properties of Ti@(Al-Si-Ti)(p)/A356 Composite Prepared via Powder Thixoforming

doi:10.3390/met8100829

	Effects of Mold Temperature on the Microstructure and Tensile Properties of Ti@(Al-Si-Ti)(p)/A356 Composite Prepared via Powder Thixoforming
	Gao, Min; Chen, Tijun; Qin, He
刊名	METALS
	2018-10
卷号	8 期号:10
关键词	core-shell-structured particle Al metal matrix composite powder thixoforming mold temperature toughening mechanism
ISSN号	2075-4701
DOI	10.3390/met8100829
英文摘要	A novel A356 Al-based composite reinforced with Ti@(Al-Si-Ti) core-shell-structured particles (Ti@(Al-Si-Ti)(p)) was prepared utilizing powder thixoforming method. The effects of mold temperature on the microstructures and tensile properties of the composites, as well as the toughening mechanisms, were investigated. The results indicated that the primary alpha-Al particles gradually coarsened and evolved into large-sized interconnected particles with the rise of mold temperature. Simultaneously, the core-shell structured reinforcements tended to agglomerate and the eutectic Si phases gradually coarsened and became spheroidal. The tensile properties of the synthesized composites firstly increased as the mold temperature rose from 150 degrees C to 200 degrees C due mainly to the improvement of the microstructure compactness and the spheroidization of the eutectic Si phases, and then decreased resulting from the coarsening of both the primary particles and eutectic Si phases, the agglomeration of the reinforcing particles and the deteriorated microstructure compactness. The composite thixoformed at 200 degrees C had an excellent elongation of 8.3% besides high tensile strengths. The excellent ductility can be attributed to decreased crack size in the shell and delayed crack propagation by plastic deformation, and multiplication of secondary cracks in the Ti core that originated from the core-shell structure of the reinforcements.
资助项目	National Natural Science Foundation of China[51564035]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	MDPI
WOS记录号	WOS:000448658700093
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32408]
专题	材料科学与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, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Gao, Min,Chen, Tijun,Qin, He. Effects of Mold Temperature on the Microstructure and Tensile Properties of Ti@(Al-Si-Ti)(p)/A356 Composite Prepared via Powder Thixoforming[J]. METALS,2018,8(10).
APA	Gao, Min,Chen, Tijun,&Qin, He.(2018).Effects of Mold Temperature on the Microstructure and Tensile Properties of Ti@(Al-Si-Ti)(p)/A356 Composite Prepared via Powder Thixoforming.METALS,8(10).
MLA	Gao, Min,et al."Effects of Mold Temperature on the Microstructure and Tensile Properties of Ti@(Al-Si-Ti)(p)/A356 Composite Prepared via Powder Thixoforming".METALS 8.10(2018).