Necking behavior and microstructural evolution during high strain rate superplastic deformation of IN718 superalloy

IMR OpenIR

	Necking behavior and microstructural evolution during high strain rate superplastic deformation of IN718 superalloy
	Huang, Linjie; Qi, Feng; Yu, Lianxu; Xin, Xin; Liu, Fang; Sun, Wenru; Hu, Zhuangqi; wrsun@imr.ac.cn
	2015
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	634 页码:71-76
摘要	Necking, one of the most special characteristics for IN718 alloy during the superplastic deformation with respect to other conventional superplastic alloys, dominates the failure of the alloy in the high strain rate superplastic deformation (10(-2)-10(-1) s(-1)). We have systematically investigated the necking procedure by tensile experiment (950 degrees C and 10(-2) s(-1)), with particular emphasis on the microstructural evolution. We have found that the grains were refined by the increasing low angle grain boundaries before necking, and a positive gradient of grain size was present from the necking zone to the grip. After necking, the low angle grain boundaries have been found transformed to the high angle grain boundaries continually without apparent change on the grain size. We deem that the dislocation motion plays the main role before necking and the propagation of necking is closely related to the extent of dynamic recrystallization, the unique deformation mechanism of IN718 alloy. (C) 2015 Elsevier B.V. All rights reserved.
部门归属	[huang, linjie ; qi, feng ; yu, lianxu ; xin, xin ; liu, fang ; sun, wenru ; hu, zhuangqi] chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词	In718 Superplasticity Necking Dynamic Recrystallization Grain Boundary
收录类别	sci
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/75016
专题	中国科学院金属研究所
通讯作者	wrsun@imr.ac.cn
推荐引用方式 GB/T 7714	Huang, Linjie,Qi, Feng,Yu, Lianxu,et al. Necking behavior and microstructural evolution during high strain rate superplastic deformation of IN718 superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2015,634:71-76.
APA	Huang, Linjie.,Qi, Feng.,Yu, Lianxu.,Xin, Xin.,Liu, Fang.,...&wrsun@imr.ac.cn.(2015).Necking behavior and microstructural evolution during high strain rate superplastic deformation of IN718 superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,634,71-76.
MLA	Huang, Linjie,et al."Necking behavior and microstructural evolution during high strain rate superplastic deformation of IN718 superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 634(2015):71-76.