Effects of B content on microstructure and high-temperature stress rupture properties of a high chromium polycrystalline nickel-based superalloy

doi:10.1016/j.jallcom.2020.157929

CORC > 金属研究所 > 中国科学院金属研究所

	Effects of B content on microstructure and high-temperature stress rupture properties of a high chromium polycrystalline nickel-based superalloy
	Wang, Haiwei 1,2; Yang, Jinxia 1; Meng, Jie 1; Ci, Shiwei 1,2; Yang, Yanhong 1; Sheng, Naicheng 1; Zhou, Yizhou 1; Sun, Xiaofeng 1
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2021-04-15
卷号	860 页码:11
关键词	Nickel-based superalloy Boron Microstructure Grain boundary Stress rupture properties
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2020.157929
通讯作者	Yang, Jinxia(jxyang@imr.ac.cn) ; Meng, Jie(jmeng@imr.ac.cn) ; Zhou, Yizhou(yzzhou@imr.ac.cn)
英文摘要	Effects of boron (B) addition on microstructure and high-temperature stress rupture properties of a heat-treated high chromium polycrystalline Nickel-based superalloy were investigated by adjusting B content (0, 0.016 wt%, 0.048 wt%, 0.09 wt%). The results indicated that the grain boundary characteristics were altered by B addition, such as the morphologies of the MC carbides, M23C6 carbides and precipitation of gamma' particles along grain boundaries. Meanwhile, it was confirmed that B existed in the form of Cr-rich M5B3 borides in the boron-containing alloys. Moreover, boron addition aggravated the inhomogeneity of microstructures, and reduced the volume fraction of secondary gamma' particles. Additionally, the rupture life was remarkably improved as the B content was increased to 0.016 wt%, whilst the elongation tended to improve as the B content was increased to 0.048 wt%. The improvement of stress rupture properties was mainly contributed to the modification of the grain boundary characteristics which retarded crack nucleation and propagation at grain boundaries. However, with excessive addition of B, the stress rupture properties were reduced significantly, as the solid solution strengthening and precipitation strengthening tended to be weakened by B addition, in addition the incipient melting regions and lager size borides promoted the intragranular crack nucleation and propagation. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Key R&D Program of China[2019YFA0705300] ; National Science and Technology Major Project[2017-.-0003-0073] ; National Natural Science Foundation of China[51701210]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000614154600031
资助机构	National Key R&D Program of China ; National Science and Technology Major Project ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/159195]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yang, Jinxia; Meng, Jie; Zhou, Yizhou
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 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	Wang, Haiwei,Yang, Jinxia,Meng, Jie,et al. Effects of B content on microstructure and high-temperature stress rupture properties of a high chromium polycrystalline nickel-based superalloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2021,860:11.
APA	Wang, Haiwei.,Yang, Jinxia.,Meng, Jie.,Ci, Shiwei.,Yang, Yanhong.,...&Sun, Xiaofeng.(2021).Effects of B content on microstructure and high-temperature stress rupture properties of a high chromium polycrystalline nickel-based superalloy.JOURNAL OF ALLOYS AND COMPOUNDS,860,11.
MLA	Wang, Haiwei,et al."Effects of B content on microstructure and high-temperature stress rupture properties of a high chromium polycrystalline nickel-based superalloy".JOURNAL OF ALLOYS AND COMPOUNDS 860(2021):11.