Effect of wall thickness on micropores and stress-rupture properties of a single-crystal nickel-based superalloy

doi:10.1016/j.msea.2023.144941

IMR OpenIR

	Effect of wall thickness on micropores and stress-rupture properties of a single-crystal nickel-based superalloy
	Wu, J. J.1,2; Meng, J.1,2; Zou, M. K.1,2; Yao, L. N.1,2; Wang, X. G.1,2; Yang, Y. H.1,2; Zhou, Y. Z.1,2; Sun, X. F.1,2
通讯作者	Meng, J.(jmeng@imr.ac.cn) ; Zhou, Y. Z.(yzzhou@imr.ac.cn)
	2023-05-08
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	872 页码:11
摘要	The effect of wall thickness on the microporosity and stress-rupture properties of a second-generation singlecrystal nickel-based superalloy was investigated using optical microscopy, scanning electron microscopy, energydispersive spectroscopy, and X-ray computed tomography. Specimens with various thicknesses (0.8, 1, 1.5, and 3 mm) were subjected to stress-rupture experiments at 980 degrees C and 250 MPa. The stress-rupture lives of the 0.8- and 1-mm-thick samples were shorter than those of the 1.5- and 3-mm-thick samples. The results indicate that increasing wall thickness results in an increased eutectic fraction, primary dendrite arm spacing, and degree of dendritic segregation of the as-cast alloys, which promotes porosity growth during solution heat treatment. The reduction in the real load-bearing cross-sections and a discontinuous Al2O3 layer caused by the oxidation behavior significantly influence the fracture mechanism of the thin-walled specimens, whereas preexisting micropores significantly affect the stress-rupture properties of the thicker specimens.
关键词	Fracture mechanics Single-crystal superalloy Wall thickness Micropores
资助者	National Key R amp; D Program of China ; National Science and Technology Major Project ; Sichuan Science and Technology Program
DOI	10.1016/j.msea.2023.144941
收录类别	SCI
语种	英语
资助项目	National Key R amp; D Program of China[2019YFA0705300] ; National Science and Technology Major Project[Y2019-VII-0011-0151] ; Sichuan Science and Technology Program[2022YFSY0016]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001026497800001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/178580
专题	中国科学院金属研究所
通讯作者	Meng, J.; Zhou, Y. Z.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wu, J. J.,Meng, J.,Zou, M. K.,et al. Effect of wall thickness on micropores and stress-rupture properties of a single-crystal nickel-based superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,872:11.
APA	Wu, J. J..,Meng, J..,Zou, M. K..,Yao, L. N..,Wang, X. G..,...&Sun, X. F..(2023).Effect of wall thickness on micropores and stress-rupture properties of a single-crystal nickel-based superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,872,11.
MLA	Wu, J. J.,et al."Effect of wall thickness on micropores and stress-rupture properties of a single-crystal nickel-based superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 872(2023):11.