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

IMR OpenIR

	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
通讯作者	Yang, Jinxia(jxyang@imr.ac.cn) ; Meng, Jie(jmeng@imr.ac.cn) ; Zhou, Yizhou(yzzhou@imr.ac.cn)
	2021-04-15
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	860 页码:11
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.
关键词	Nickel-based superalloy Boron Microstructure Grain boundary Stress rupture properties
资助者	National Key R&D Program of China ; National Science and Technology Major Project ; National Natural Science Foundation of China
DOI	10.1016/j.jallcom.2020.157929
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000614154600031
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：19[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/321006/159196
专题	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.