A modification on Brook formula in calculating the misfit of Ni-based superalloys

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	A modification on Brook formula in calculating the misfit of Ni-based superalloys
	Long, Haibo ; Mao, Shengcheng ; Xiang, Sisi ; Chen, Yanhui ; Wei, Hua ; Zhou, Yizhou ; Liu, JinLai ; Liu, Yinong
刊名	MATERIALS & DESIGN
	2017-07-15
卷号	126 页码:12-17
关键词	Ni-based superalloy Misfit Brook formula Dislocation network Burgers vector Creep
ISSN号	0264-1275
通讯作者	Mao, SC (reprint author), Beijing Univ Technol, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100124, Peoples R China. ; Wei, H (reprint author), Nanjing Tech Univ, Coll Mat Sci & Engn, Nanjing 211800, Jiangsu, Peoples R China. ; Liu, YN (reprint author), Univ Western Australia, Sch Mech & Chem Engn, Crawley, WA 6009, Australia.
中文摘要	The validity of the Brooke formula in estimating the lattice misfit based on dislocation network structure in Nibased superalloys is investigated. The misfit value of a sample subjected to prolonged thermal exposure as derived from the popular Brooke formula is below that determined by X-ray diffraction (XRD) method, whereas the misfit estimated using the Brooke formula for a sample subjected to creep is greater than that determined by XRD method. These discrepancies imply the invalidity of the popular Brooke formula in two aspects: that a dislocation network is not always mature to fully relax the lattice misfit leading underestimate the misfit and that using the full magnitude of the Burgers vector overestimates the misfit. To overcome this problem, a modified Brook formula using the {100} projection of the edge component of a Burgers vector as the effective magnitude to relieve the misfit is proposed. The misfit derived from the modified Brook formula is in good agreement with the values determined by XRD method for a number of Ni-based superalloys studied.
学科主题	Materials Science, Multidisciplinary
收录类别	SCI
资助信息	NSFC [51471008, 51231008, 11327901, 51371173]; Beijing Nova program [Z141103001814108]; Beijing Municipal Education Commission research project [KM201410005033]; Project of Construction of Innovative Teams and Teacher Career Development for Universities and Colleges Under Beijing Municipality [IDHT20140504]; Beijing University of Technology in young teacher ability of internationalization development plans; Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions (CIT) [TCD201504013]
语种	英语
公开日期	2017-08-17
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78047]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Long, Haibo,Mao, Shengcheng,Xiang, Sisi,et al. A modification on Brook formula in calculating the misfit of Ni-based superalloys[J]. MATERIALS & DESIGN,2017,126:12-17.
APA	Long, Haibo.,Mao, Shengcheng.,Xiang, Sisi.,Chen, Yanhui.,Wei, Hua.,...&Liu, Yinong.(2017).A modification on Brook formula in calculating the misfit of Ni-based superalloys.MATERIALS & DESIGN,126,12-17.
MLA	Long, Haibo,et al."A modification on Brook formula in calculating the misfit of Ni-based superalloys".MATERIALS & DESIGN 126(2017):12-17.