Effect of Micro-scale Y Addition on the Fracture Properties of Al–Cu–Mn Alloy

doi:10.1186/s10033-018-0282-x

	Effect of Micro-scale Y Addition on the Fracture Properties of Al–Cu–Mn Alloy
	Guo, Ting-Biao 1,2; Zhang, Feng 2; Ding, Wan-Wu 1,2; Jia, Zhi 1,2
刊名	Chinese Journal of Mechanical Engineering (English Edition)
	2018-12-01
卷号	31 期号:1
关键词	Aluminum metallography Brittleness Copper alloys Copper metallography Deterioration Ductile fracture Fracture toughness Grain boundaries Hardness Heat treatment Manganese alloys Mechanical properties Microstructure Plasticity Rare earths Scanning electron microscopy Solid solutions Spectrometers Ternary alloys Yttrium metallography Artificial aging treatments Deformation compatibility Energy dispersive spectrometers Fracture characteristics Inter-metallic compounds Microstructure and mechanical properties Optical microscopes Strengthening effect
ISSN号	10009345
DOI	10.1186/s10033-018-0282-x
英文摘要	Rare earth (RE) elements have positive effects on Al alloy, while most research is focused on microstructure and mechanical properties. As important application indices, toughness and plasticity are properties that are sensitive to alloy fracture characteristics, and few research studies have characterized the fracture properties of Al–Cu–Mn alloy on RE elements. The effect of different contents of Y on the fracture properties of Al–Cu–Mn alloy is investigated. T6 heat treatment (solid solution and artificial aging treatment), optical microscope (OM), scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) methods are applied to the alloy. Results showed that when Y element is present at 0.1%, the section of the as-cast alloy has smaller sized dimples and the fracture mode presents ductile features. Slight changes in hardness are also observed and maintained at about 60 HV. With increasing content of the RE element Y from 0.1 to 0.5%, the θ phase and Cu atoms in the matrix were reduced and most stopped at Grain boundaries (GBs). Micro-segregation and an enriched zone of Y near the GBs gradually increased. At the same time, the inter-metallic compound AlCuY is aggregated at grain junctions causing deterioration of the micro-structure and fracture properties of the alloy. After T6 treatment, the flatness of the fracture surface was lower than that of all the as-cast alloy showing lots of dimples and teared edges with a significant increase in hardness. When Y content was 0.1%, the strength and hardness of the alloy increased due to refinement of the grain strengthening effect. The content of Y elements segregated in the inter-dendritic zone and GBs is reduced. Plasticity and deformation compatibility also improved, making cracks difficult to form and merge with each other along adjacent grain junctions and providing an increased potential for ductile fracture. This paper proposes the addition of RE Y as an effective and prospective strategy to improve the fracture properties of the Al–Cu–Mn alloy and provide a meaningful reference in terms of improving overall performance. © 2018, The Author(s).
WOS研究方向	Engineering
语种	英语
出版者	Chinese Mechanical Engineering Society, Singapore
WOS记录号	WOS:000445235800001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114733]
专题	材料科学与工程学院
作者单位	1.Key Laboratory of Nonferrous Alloys and Processing of Ministry of Education, Lanzhou; 730050, China 2.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Guo, Ting-Biao,Zhang, Feng,Ding, Wan-Wu,et al. Effect of Micro-scale Y Addition on the Fracture Properties of Al–Cu–Mn Alloy[J]. Chinese Journal of Mechanical Engineering (English Edition),2018,31(1).
APA	Guo, Ting-Biao,Zhang, Feng,Ding, Wan-Wu,&Jia, Zhi.(2018).Effect of Micro-scale Y Addition on the Fracture Properties of Al–Cu–Mn Alloy.Chinese Journal of Mechanical Engineering (English Edition),31(1).
MLA	Guo, Ting-Biao,et al."Effect of Micro-scale Y Addition on the Fracture Properties of Al–Cu–Mn Alloy".Chinese Journal of Mechanical Engineering (English Edition) 31.1(2018).