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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; 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.
2017-07-15
发表期刊MATERIALS & DESIGN
ISSN0264-1275
卷号126页码:12-17
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.; 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.
部门归属[long, haibo ; mao, shengcheng ; xiang, sisi ; chen, yanhui] beijing univ technol, beijing key lab microstruct & property adv mat, beijing 100124, peoples r china ; [wei, hua] nanjing tech univ, coll mat sci & engn, nanjing 211800, jiangsu, peoples r china ; [zhou, yizhou ; liu, jinlai] chinese acad sci, inst met res, superalloys div, shenyang 110016, peoples r china ; [liu, yinong] univ western australia, sch mech & chem engn, crawley, wa 6009, australia
关键词Ni-based Superalloy Misfit Brook Formula Dislocation Network Burgers Vector Creep
学科领域Materials Science, Multidisciplinary
资助者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]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78047
专题中国科学院金属研究所
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.
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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, YN .(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.
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