Effects of nitrogen content on microstructures and tensile properties of a new Ni-Fe based wrought superalloy

doi:10.1016/j.msea.2020.140436

IMR OpenIR

	Effects of nitrogen content on microstructures and tensile properties of a new Ni-Fe based wrought superalloy
	Liu, Peng 1,2; Zhang, Rui 1; Yuan, Yong 3; Cui, Chuanyong 1; Liang, Faguang 3; Liu, Xi 3; Gu, Yuefeng 3; Zhou, Yizhou 1; Sun, Xiaofeng 1
通讯作者	Zhang, Rui(rzhang@imr.ac.cn) ; Cui, Chuanyong(chycui@imr.ac.cn)
	2021-01-13
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	801 页码:10
摘要	The influence of the nitrogen (N) content (0.0013-0.034 wt%) on the microstructures and 750 ?C tensile properties of a newly developed Ni-Fe based wrought superalloy (named as HT700T alloy) for ultra-supercritical power plant applications beyond 700 ?C was investigated using scanning electron microscopy (SEM), electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) techniques. The results show that the increase in the N content promotes the morphological transformation of the intergranular Cr23C6 carbides from semi-continuous rods to discrete granular particles, and leads to the decrease of the amount of the Cr23C6 carbides. Meanwhile, the increase in the N content promotes the formation of the MX phase and the MX phase more preferentially forms at the grain boundary. The N content has no obvious effects on the morphology of the gamma ' phase, but slightly decreases the gamma ' fraction. The average grain size continuously decreases with the increase of N content and the proportion of low Sigma coincident site lattice (CSL) boundary significantly increases at the 0.0077% N content. The 750 degrees C tensile properties show that the increase of N content has little effect on the yield and tensile strength of the alloy, while the ductility increases remarkably. A mixture fracture mode of intergranular and transgranular occurs in all samples regardless of the N content. The dominant deformation mechanism is gamma ' bypassing via Orowan looping regardless of the N content, while deformation microtwinning and stacking faults shearing the gamma ' precipitates are confirmed to be the assistant deformation mechanisms at the 0.0077% N content.
关键词	Ni-Fe based wrought superalloy Nitrogen Microstructure Tensile property Deformation mechanism
资助者	National Natural Science Foundation of China ; Ministry of Science and Technology of China
DOI	10.1016/j.msea.2020.140436
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51671189] ; Ministry of Science and Technology of China[2017YFA0700703] ; Ministry of Science and Technology of China[2019YFA0705304]
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:000600959500003
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：20[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/321006/158799
专题	中国科学院金属研究所
通讯作者	Zhang, Rui; Cui, Chuanyong
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 3.Xian Thermal Power Res Inst Co Ltd, Xian 710032, Peoples R China
推荐引用方式 GB/T 7714	Liu, Peng,Zhang, Rui,Yuan, Yong,et al. Effects of nitrogen content on microstructures and tensile properties of a new Ni-Fe based wrought superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,801:10.
APA	Liu, Peng.,Zhang, Rui.,Yuan, Yong.,Cui, Chuanyong.,Liang, Faguang.,...&Sun, Xiaofeng.(2021).Effects of nitrogen content on microstructures and tensile properties of a new Ni-Fe based wrought superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,801,10.
MLA	Liu, Peng,et al."Effects of nitrogen content on microstructures and tensile properties of a new Ni-Fe based wrought superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 801(2021):10.