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 JD(刘纪德); Qiao HC(乔红超); Zhou YZ(周亦胄); Jin T(金涛); Zhao JB(赵吉宾); Sun XF(孙晓峰); Hu ZQ(胡壮麒)
刊名	Materials Science and Engineering A
	2017
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	刘纪德
产权排序	3
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 °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 °C, surface hardening layer hindered the macro necking, which resulted in the relatively lower plasticity.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
研究领域[WOS]	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
关键词[WOS]	FATIGUE LIFE ; STRESS-RELAXATION ; PEENED TI-6AL-4V ; RESIDUAL-STRESS ; STAINLESS-STEEL ; ALLOY ; FRACTURE
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000394073300007
内容类型	期刊论文
源URL	[http://ir.sia.cn/handle/173321/19816]
专题	沈阳自动化研究所_装备制造技术研究室
推荐引用方式 GB/T 7714	Lu, G.X.,Liu JD,Qiao HC,et al. Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy[J]. Materials Science and Engineering A,2017,686:46-53.
APA	Lu, G.X..,Liu JD.,Qiao HC.,Zhou YZ.,Jin T.,...&Hu ZQ.(2017).Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy.Materials Science and Engineering A,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 686(2017):46-53.