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Understanding of failure mechanisms of the oxide scales formed on nanocrystalline coatings with different Al content during cyclic oxidation
Yang, Shasha1,2; Yang, Lanlan4; Chen, Minghui3; Wang, Jinlong3; Zhu, Shenglong1; Wang, Fuhui3
Corresponding AuthorChen, Minghui(mhchen@mail.neu.edu.cn)
2021-02-15
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume205Pages:13
AbstractCyclic oxidation behaviors of three nanocrystalline coatings with phase constitutions of gamma/gamma', single. gamma', and. gamma/beta, respectively, tailored by adjusting the Al content, are investigated. The oxide scale on gamma/gamma' coating exhibits serious surface rumpling accompanied by frequently cracking at the crests of undulations after 500 cycles at 1100 degrees C. The premature degradation of the coating in microstructure (i.e. gamma' phase dissolution and concurrent grain coarsening), arising from high oxidation rate and low original Al content, not only increases its CTE to introduce larger thermal stress, but also decreases its hardness and elastic modulus, making it susceptible to rumpling and further inducing cracking of oxide scale. Comparatively, benefited from lower oxidation rate and higher Al content, the degradation of. gamma' and gamma'/beta coatings is less significant. They are subjected to lower thermal stress but possess higher deformation resistance during cycling. However, local spallation of the oxide scale occurs on. gamma'/beta coating since it is insusceptible to rumpling and thus the thermal stress is difficult to release in time by plastic deformation. The. ' coating outperforms its counterparts of gamma/gamma', and gamma'/beta coatings, presenting low oxidation rate, high resistance to scale cracking and spallation, meanwhile, limited elements-interdiffusion with the underlying substrate. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. Allrights reserved.
KeywordOxidation Nanocrystalline coatings Rumpling Thermal stress
Funding OrganizationNational Natural Science Foundation of China ; Ministry of Industry and Information Technology Project
DOI10.1016/j.actamat.2020.116576
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51671053] ; National Natural Science Foundation of China[51801021] ; Ministry of Industry and Information Technology Project[MJ-2017-J-99]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000609936600041
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159121
Collection中国科学院金属研究所
Corresponding AuthorChen, Minghui
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Coll Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Northeastern Univ, Shenyang Natl Lab Mat Sci, Shenyang 110819, Peoples R China
4.Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Yang, Shasha,Yang, Lanlan,Chen, Minghui,et al. Understanding of failure mechanisms of the oxide scales formed on nanocrystalline coatings with different Al content during cyclic oxidation[J]. ACTA MATERIALIA,2021,205:13.
APA Yang, Shasha,Yang, Lanlan,Chen, Minghui,Wang, Jinlong,Zhu, Shenglong,&Wang, Fuhui.(2021).Understanding of failure mechanisms of the oxide scales formed on nanocrystalline coatings with different Al content during cyclic oxidation.ACTA MATERIALIA,205,13.
MLA Yang, Shasha,et al."Understanding of failure mechanisms of the oxide scales formed on nanocrystalline coatings with different Al content during cyclic oxidation".ACTA MATERIALIA 205(2021):13.
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