Core-shell-structured particle reinforced A356 matrix composite prepared by powder-thixoforming: Effect of reheating temperature

doi:10.3390/ma11091718

	Core-shell-structured particle reinforced A356 matrix composite prepared by powder-thixoforming: Effect of reheating temperature
	Chen, Tijun; Geng, Libo; Qin, He; Gao, Min
	2018-09-13
发表期刊	Materials
卷号	11 期号:9
摘要	A novel core-shell-structured Ti-(Al-Si-Ti) particle (Ti-(Al-Si-Ti)p) reinforced A356 matrix composite was fabricated by a new method, powder thixoforming, which combines the merits of both powder metallurgy and semisolid thixoforming. The effects of reheating temperature on the microstructure and tensile properties of the resulting composite were investigated. The results indicated that the thickening of the Al-Si-Ti compound shells, with rising the reheating temperature, significantly enhanced the strengthening role, but the fracture and peeling of the shells, at higher than 600 °C, impaired the strengthening effect. The composite formed at 600 °C had a favorable tensile elongation of 8.3% besides high tensile strengths. During tensile testing, the Ti@(Al-Si-Ti)p frequently fractured across the Ti cores and occasionally cracked around the Ti cores, but preferentially fractured between the outer cracked shells and the inner cores for the composites thixoformed at higher than 600 °C. The delayed formation of cracks in the Ti-(Al-Si-Ti)p and the small size of the cracks contributed to ductility improvement. The MSL model, modified according to the Ti@(Al-Si-Ti)p characteristics, was essentially suitable for predicting the yield strength of such composites. The largest contribution to the strength was resulted from solid solution strengthening of Ti element, but the strengthening role from geometrically necessary dislocations was significantly improved as the reheating temperature rose from 590 °C to 600 °C. © 2018 by the authors.
关键词	Aluminum compounds Cracks Fracture Industrial heating Particle reinforced composites Powder metallurgy Reinforcement Shells (structures) Silicon compounds Tensile strength Tensile testing Ductility improvement Geometrically necessary dislocations High-tensile strength Reheating temperature Solid solution strengthening Strengthening effect Structured particles Tensile elongation
DOI	10.3390/ma11091718
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000446395200234
出版者	MDPI AG, Postfach, Basel, CH-4005, Switzerland
EI入藏号	20183805830984
EI主题词	Titanium compounds
EI分类号	408.2 Structural Members and Shapes - 531.1 Metallurgy - 642.1 Process Heating - 951 Materials Science
来源库	Compendex
分类代码	408.2 Structural Members and Shapes - 642.1 Process Heating - 951 Materials Science
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/114075
专题	材料科学与工程学院
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
第一作者单位	省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室
第一作者的第一单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 GB/T 7714	Chen, Tijun,Geng, Libo,Qin, He,et al. Core-shell-structured particle reinforced A356 matrix composite prepared by powder-thixoforming: Effect of reheating temperature[J]. Materials,2018,11(9).
APA	Chen, Tijun,Geng, Libo,Qin, He,&Gao, Min.(2018).Core-shell-structured particle reinforced A356 matrix composite prepared by powder-thixoforming: Effect of reheating temperature.Materials,11(9).
MLA	Chen, Tijun,et al."Core-shell-structured particle reinforced A356 matrix composite prepared by powder-thixoforming: Effect of reheating temperature".Materials 11.9(2018).