The formation of Ni5Al3 phase and its effect on the mechanical properties of In783 alloy

doi:10.1016/j.intermet.2020.106930

	The formation of Ni5Al3 phase and its effect on the mechanical properties of In783 alloy
	Yang, Maohong 1; Zhang, Zheng 1; Han, Zhongshuai 1; Du, Jinfeng 3; Huang, Jiankang 2
刊名	Intermetallics
	2020-11-01
卷号	126
关键词	Aluminum alloys Binary alloys Cracks Hardness Light transmission Tensile strength Transmission electron microscopy After-service Crack initiation and propagation Crystal transformation Dynamic evolution Element diffusion Formation process Long term service Strength increase
ISSN号	09669795
DOI	10.1016/j.intermet.2020.106930
英文摘要	Based on the IN783 alloy of as-received state, post-serviced state and thermal-cycled state, this paper studied the Ni5Al3 phases appearing in the NiAl phase of IN783 alloy by optical microscope, transmission electron microscope. The type and formation process of Ni5Al3 phase were analyzed. The dynamic evolution of the crack initiation and propagation on as-received state and post-serviced state was in-situ observed by SEM, and the microcrack characteristic was studied. It is found that Ni5Al3 phase is present in the NiAl of IN783 alloy under post-serviced state and thermal-cycled state. There are two ways to form the Ni5Al3 phase in IN783 alloy. The Ni5Al3 phase formed during long-term service is due to element diffusion. The Ni5Al3 phase formed during the thermal cycle is mainly the crystal transformation of the M-NiAl phase to the Ni5Al3 phase. The crack of alloy in as-received state sprouts from the stress concentration of the matrix and expands in the matrix. There is no crack in the NiAl phase. In post-serviced state, the crack of the alloy starts from the NiAl phase, and then the cracks expand and connect, causing the material to break. After serving the alloy, the tensile strength increase, and the elongation decreases. After service, the hardness of NiAl phase decreases and the hardness of matrix increases, which makes the difference in mechanical properties between the two increase. © 2020
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000579759400017
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115694]
专题	材料科学与工程学院
作者单位	1.School of Material Science and Engineering, Beihang University, 37 Xueyuan Road, Beijing; 100191, China; 2.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China 3.Shenhua Guohua (Beijing) Electric Power Research Institute Co., Ltd., No.75 Jian Guo Road, Chaoyang District, Beijing; 100025, China;
推荐引用方式 GB/T 7714	Yang, Maohong,Zhang, Zheng,Han, Zhongshuai,et al. The formation of Ni5Al3 phase and its effect on the mechanical properties of In783 alloy[J]. Intermetallics,2020,126.
APA	Yang, Maohong,Zhang, Zheng,Han, Zhongshuai,Du, Jinfeng,&Huang, Jiankang.(2020).The formation of Ni5Al3 phase and its effect on the mechanical properties of In783 alloy.Intermetallics,126.
MLA	Yang, Maohong,et al."The formation of Ni5Al3 phase and its effect on the mechanical properties of In783 alloy".Intermetallics 126(2020).