Regulating the microstructure of Ti@TiAlSi core-shell structured reinforcing particles endows Al–Si alloy matrix composites with high strength and ductility

doi:10.1016/j.msea.2024.146355

	Regulating the microstructure of Ti@TiAlSi core-shell structured reinforcing particles endows Al–Si alloy matrix composites with high strength and ductility
	Gao, Min; Chen, Tijun; Wang, Lingyun
	2024-04
发表期刊	Materials Science and Engineering: A
ISSN	0921-5093
卷号	898
摘要	Forming spherical core-shell (CS) structured reinforcing particles, consisting of a Ti core and a surrounding TiAlSi intermetallic shell, by in situ reaction between Ti and Al matrix is a promising approach to overcome the strength-ductility trade-off in particle reinforced Al–Si matrix composites. However, the phase constituent and microstructure of the shells are highly sensitive to the Al–Si alloy composition and processing parameters of the powder thixoforming method. Therefore, the effects of Si content and partial remelting temperature on the microstructure of CS particles and the tensile properties of the resultant composites were investigated in this study. The results indicate that uniform and compact shell can be achieved only by the τ2-phase reaction layer generated during partial remelting. To form the τ2 phase, the Si content in the liquid phase of the semisolid billet prior to thixoforming must be higher than 10.3 wt%. This can be achieved through adjusting the Si content in the Al–Si alloy matrix or/and partial remelting temperature. Moreover, the Ti core radius to shell thickness ratio of ∼1.5 was proposed to achieve the composites with both high strength and ductility. These findings are helpful for designing the microstructure and fabricating CS particles reinforced metal matrix composites with excellent comprehensive mechanical properties. © 2024 Elsevier B.V.
关键词	Aluminum Aluminum alloys Economic and social effects High strength alloys Metallic matrix composites Microstructure Particle reinforced composites Powder metals Remelting Shells (structures) Silicon alloys Titanium alloys Al-Si alloy Alloy matrix Aluminium matrix composites Core shell Core-shell structured reinforcing particle Matrix composite Partial remelting Partial remelting temperature Reinforcing particles Si content
DOI	10.1016/j.msea.2024.146355
收录类别	EI
语种	英语
出版者	Elsevier Ltd
EI入藏号	20241315811647
EI主题词	Ductility
EI分类号	408.2 Structural Members and Shapes ; 531 Metallurgy and Metallography ; 531.1 Metallurgy ; 534.1 Foundries ; 541.1 Aluminum ; 541.2 Aluminum Alloys ; 542.3 Titanium and Alloys ; 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals ; 951 Materials Science ; 971 Social Sciences
原始文献类型	Journal article (JA)
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/170269
专题	材料科学与工程学院
通讯作者	Chen, Tijun
作者单位	State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Gao, Min,Chen, Tijun,Wang, Lingyun. Regulating the microstructure of Ti@TiAlSi core-shell structured reinforcing particles endows Al–Si alloy matrix composites with high strength and ductility[J]. Materials Science and Engineering: A,2024,898.
APA	Gao, Min,Chen, Tijun,&Wang, Lingyun.(2024).Regulating the microstructure of Ti@TiAlSi core-shell structured reinforcing particles endows Al–Si alloy matrix composites with high strength and ductility.Materials Science and Engineering: A,898.
MLA	Gao, Min,et al."Regulating the microstructure of Ti@TiAlSi core-shell structured reinforcing particles endows Al–Si alloy matrix composites with high strength and ductility".Materials Science and Engineering: A 898(2024).