Resistant stress for creep in cast nickel-base superalloys
Yuan, C; Guo, JT; Yang, HC
Corresponding AuthorYuan, C()
AbstractOn the basis of reviewing briefly the particle hardening theories and various dislocation creep theories, a modified dislocation creep model was proposed, in which the resistant stress is a key factor to creep mechanism. When applied stress is high enough for the dislocations to cut into the gamma' particles, it is thought that creep deformation is mainly controlled by the particle cutting mechanism, and the resistant stress is almost a constant, which is irrelative to the size of gamma' particles and applied stress. At low applied stress, it is suggested that creep deformation is mainly controlled by the dislocations climb mechanism. In this case, the resistant stress has two components: a threshold stress term defined by the minimum stress required for various climb mechanism, and a friction stress term represented by the contribution of solid-solution strengthening and dislocation strengthening, which is strongly dependent on applied stress. Finally, the model is verified in three cast nickel-base superalloys such as DS DZ17G, cast IN100, and IN738. The results of detailed calculations in terms of SL theory are in good agreement with the experimental data.
Keywordcast nickel-base superalloy creep mechanism resistant stress
Indexed BySCI
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000179827800005
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorYuan, C
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Northeastern Univ, Coll Mat & Met, Shenyang 110004, Peoples R China
Recommended Citation
GB/T 7714
Yuan, C,Guo, JT,Yang, HC. Resistant stress for creep in cast nickel-base superalloys[J]. ACTA METALLURGICA SINICA,2002,38(11):1149-1156.
APA Yuan, C,Guo, JT,&Yang, HC.(2002).Resistant stress for creep in cast nickel-base superalloys.ACTA METALLURGICA SINICA,38(11),1149-1156.
MLA Yuan, C,et al."Resistant stress for creep in cast nickel-base superalloys".ACTA METALLURGICA SINICA 38.11(2002):1149-1156.
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