Effects of reheating duration on the microstructure and tensile properties of in situ core-shell-structured particle-reinforced A356 composites fabricated via powder thixoforming

doi:10.1007/s10853-017-1713-2

CORC > 兰州理工大学 > 兰州理工大学

	Effects of reheating duration on the microstructure and tensile properties of in situ core-shell-structured particle-reinforced A356 composites fabricated via powder thixoforming
	Chen, T. J.; Qin, H.; Zhang, X. Z.
刊名	JOURNAL OF MATERIALS SCIENCE
	2018-02
卷号	53 期号:4 页码:2576-2593
ISSN号	0022-2461
DOI	10.1007/s10853-017-1713-2
英文摘要	A novel in situ core-shell-structured Ti@(Al-Si-Ti) particulate-reinforced A356 composite was synthesized via powder thixoforming. It is noted that there is a significant improvement in toughness of the particulate-reinforced Al matrix composites, and the problems related to fabrication techniques were also solved. The effects of reheating duration at a semisolid temperature of 600 A degrees C on the microstructure and tensile properties of the resulting composites were investigated. The results indicated that a thick, compact Al-Si-Ti intermetallic shell formed around the Ti powders when the reheating time was at 50 min. A composite containing these reinforcing particles exhibited good tensile properties. Its ultimate tensile strength and yield strength (YS) were decreased by only 2.1 and 3.5%, respectively, while its elongation was increased by 167.8% and up to 8.3%, compared to the (Al, Si)(3)Ti-p/A356 composite that was thixoformed after the Ti powders had completely reacted. This occurred because the core-shell-structured particles with hard, compact shells exhibited strengthening role comparable to that provided by the monolithic (Al, Si)(3)Ti intermetallic particles, and the Ti core effectively inhibited or delayed crack propagation by blunting crack tips and severe plastic deformation. In addition, a modified shear lag model that incorporated the indirect strengthening mechanisms and varying shell thicknesses of Al-Si-Ti intermetallics was proposed to successfully predict the YS of the composites.
资助项目	National Natural Science Foundation of China[51564035]
WOS研究方向	Materials Science
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000416544500024
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32786]
专题	兰州理工大学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, T. J.
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	Chen, T. J.,Qin, H.,Zhang, X. Z.. Effects of reheating duration on the microstructure and tensile properties of in situ core-shell-structured particle-reinforced A356 composites fabricated via powder thixoforming[J]. JOURNAL OF MATERIALS SCIENCE,2018,53(4):2576-2593.
APA	Chen, T. J.,Qin, H.,&Zhang, X. Z..(2018).Effects of reheating duration on the microstructure and tensile properties of in situ core-shell-structured particle-reinforced A356 composites fabricated via powder thixoforming.JOURNAL OF MATERIALS SCIENCE,53(4),2576-2593.
MLA	Chen, T. J.,et al."Effects of reheating duration on the microstructure and tensile properties of in situ core-shell-structured particle-reinforced A356 composites fabricated via powder thixoforming".JOURNAL OF MATERIALS SCIENCE 53.4(2018):2576-2593.