Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy

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	Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy
	Lu, G. X. ; Liu, J. D. ; Qiao, H. C. ; Zhou, Y. Z. ; Jin, T. ; Zhao, J. B. ; Sun, X. F. ; Hu, Z. Q.
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2017-02-16
卷号	686 页码:46-53
关键词	Nickel based superalloys Laser shock treatment Hardening Fracture Plasticity
ISSN号	0921-5093
通讯作者	Liu, JD ; Jin, T (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
中文摘要	This investigation focused on the tensile deformation behavior of a single crystal nickel-base superalloy, both in virgin condition and after laser shock processing (LSP) with varied technology parameters. Nanoindention tests were carried out on the sectioned specimens after LSP treatment to characterize the surface strengthening effect. Stress strain curves of tensile specimens were analyzed, and microstructural observations of the fracture surface and the longitudinal cross-sections of ruptured specimens were performed via scanning electron microscope (SEM), in an effort to clarify the fracture mechanisms. The results show that a surface hardening layer with the thickness of about 0.3-0.6 mm was gained by the experimental alloys after LSP treatment, but the formation of surface hardening layer had not affected the yield strength. Furthermore, fundamental differences in the plastic responses at different temperatures due to LSP treatment had been discovered. At 700 degrees C, the slip deformation was held back when it extended to the surface hardening layer and the ensuing slip steps improved the plasticity; however, at 1000 degrees C, surface hardening layer hindered the macro necking, which resulted in the relatively lower plasticity.
学科主题	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
收录类别	SCI
资助信息	High Technology Research and Development Program of China [2014AA041701]; National Natural Science Foundation of China [51171179, 51271174, 51331005, 51501219, 11332010]; Natural Science Foundation of Liaoning Province in China [2015020115]
语种	英语
公开日期	2017-08-17
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78287]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Lu, G. X.,Liu, J. D.,Qiao, H. C.,et al. Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2017,686:46-53.
APA	Lu, G. X..,Liu, J. D..,Qiao, H. C..,Zhou, Y. Z..,Jin, T..,...&Hu, Z. Q..(2017).Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,686,46-53.
MLA	Lu, G. X.,et al."Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 686(2017):46-53.