Effects of the synergistic addition of AlCrNiTi and Ce on the microstructure and mechanical properties of hypoeutectic Al-7Si alloy

doi:10.1016/j.jallcom.2024.174201

IR > 机电工程学院

	Effects of the synergistic addition of AlCrNiTi and Ce on the microstructure and mechanical properties of hypoeutectic Al-7Si alloy
	Zhang, Jie1 ; Zhang, Ziqi 1; Qiao, Zhaobo 1; Li, Qinglin1,2 ; Li, Yuandong1,2
	2024-06-15
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	988
摘要	A new strategy is proposed in this study to modify the microstructure of the Al-7Si alloy, which is widely employed in the aerospace and transportation sectors due to its lightweight, high specific strength, and specific modulus. The primary challenge of the Al-7Si alloy is its coarse microstructure, which undermines its mechanical properties. This research focuses on the effects of adding the AlCrNiTi master alloy and Ce to the Al-7Si alloy. The impact on both the microstructure evolution and the mechanical properties is examined, including analysis and discussion of the underlying mechanisms for refinement and strengthening. When the alloy was modified by 0.9 wt% of the AlCrNiTi master alloy and 0.1 wt% of Ce, there was a notable refinement of the α-Al phase, transforming it from a coarse dendritic structure to fine equiaxed grains. The addition of 0.9 wt% of the AlCrNiTi master alloy and 0.1 wt% of Ce can also reduce the secondary dendrite arm spacing (SDAS) to 5.9 μm. The eutectic Si phase underwent a significant transformation, changing from coarse flakes to fine granularity with rounded edges. Furthermore, CeSi2Ni2, Al3Ni intermetallic compounds, and nanoscale Al45Cr7 particles were observed in the modified Al-7Si alloy. Tensile tests showed that the addition of the inoculant in the Al-7Si alloy enhanced the ultimate tensile strength (UTS) from 173 MPa to 211 MPa and increased the elongation (El) from 7.9% to 14.1%. © 2024 Elsevier B.V.
关键词	Binary alloys Chromium alloys High strength alloys Silicon alloys Tensile strength Tensile testing Textures Titanium alloys Aerospace sectors Al-7si alloy High specific strength Hypoeutectics Master alloys Microstructures and mechanical properties Modification Specific modulus Strength modulus Transportation sector
DOI	10.1016/j.jallcom.2024.174201
收录类别	EI
语种	英语
出版者	Elsevier Ltd
EI入藏号	20241415837547
EI主题词	Aluminum alloys
EI分类号	531.1 Metallurgy ; 541.2 Aluminum Alloys ; 542.3 Titanium and Alloys ; 543.1 Chromium and Alloys ; 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals
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/170266
专题	机电工程学院兰州理工大学材料科学与工程学院
通讯作者	Li, Qinglin
作者单位	1.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China
第一作者单位	材料科学与工程学院
通讯作者单位	材料科学与工程学院; 兰州理工大学
第一作者的第一单位	材料科学与工程学院
推荐引用方式 GB/T 7714	Zhang, Jie,Zhang, Ziqi,Qiao, Zhaobo,et al. Effects of the synergistic addition of AlCrNiTi and Ce on the microstructure and mechanical properties of hypoeutectic Al-7Si alloy[J]. Journal of Alloys and Compounds,2024,988.
APA	Zhang, Jie,Zhang, Ziqi,Qiao, Zhaobo,Li, Qinglin,&Li, Yuandong.(2024).Effects of the synergistic addition of AlCrNiTi and Ce on the microstructure and mechanical properties of hypoeutectic Al-7Si alloy.Journal of Alloys and Compounds,988.
MLA	Zhang, Jie,et al."Effects of the synergistic addition of AlCrNiTi and Ce on the microstructure and mechanical properties of hypoeutectic Al-7Si alloy".Journal of Alloys and Compounds 988(2024).