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

文献类型：期刊论文

作者Wang, Haiwei1,2; Yang, Jinxia1; Meng, Jie1; Ci, Shiwei1,2; Yang, Yanhong1; Sheng, Naicheng1; Zhou, Yizhou1; Sun, Xiaofeng1
刊名JOURNAL OF ALLOYS AND COMPOUNDS
出版日期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
DOI10.1016/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
WOS记录号WOS:000614154600031
出版者ELSEVIER SCIENCE SA
资助机构National Key R&D Program of China ; National Science and Technology Major Project ; National Natural Science Foundation of China
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.

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来源：金属研究所

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