Improvement and micro-mechanism of a low expansion superalloy
Wang, RM; Song, YG; Zhang, SW; Li, CZ
Corresponding AuthorWang, RM()
Source PublicationRARE METALS
AbstractChromium free low expansion superalloys Incoloy 900 series based on the system Fe-Ni-Co-Nb-Ti are precipitation-strengthen austenitic alloys with combination of very low thermal expansion coefficient and high tensile strength. The most important problem of these alloys is the susceptibility to stress accelerated grain boundary oxygen embrittlement (SAGBO) due to the absence of chromium. The oxidation resistance of the alloys after they were exposed for long time at high temperatures and the notch bar rupture strength have been improved with appropriate rare earth (RE) addition. With trace yttrium addition, the platelet precipitates become smaller and denser and the phase of precipitate transforms from epsilon phase to H phase. The crystal structures of the platelet phases in the conventional and Y-containing superalloys have been investigated and determined. The interface between the H phase and the matrix hits also been demonstrated.
Keywordrare earth superalloy microstructure physical properties
Indexed BySCI
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000084270500008
Citation statistics
Document Type期刊论文
Corresponding AuthorWang, RM
Affiliation1.Inst Aeronaut Mat, Beijing 100095, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Atom Imaging Solids Lab, Shenyang 110015, Peoples R China
Recommended Citation
GB/T 7714
Wang, RM,Song, YG,Zhang, SW,et al. Improvement and micro-mechanism of a low expansion superalloy[J]. RARE METALS,1999,18(2):123-128.
APA Wang, RM,Song, YG,Zhang, SW,&Li, CZ.(1999).Improvement and micro-mechanism of a low expansion superalloy.RARE METALS,18(2),123-128.
MLA Wang, RM,et al."Improvement and micro-mechanism of a low expansion superalloy".RARE METALS 18.2(1999):123-128.
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