| 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 Author | Chen, Minghui(mhchen@mail.neu.edu.cn) |
| 2021-02-15 | |
| Source Publication | ACTA MATERIALIA
 |
| ISSN | 1359-6454 |
| Volume | 205Pages:13 |
| Abstract | Cyclic 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. |
| Keyword | Oxidation Nanocrystalline coatings Rumpling Thermal stress |
| Funding Organization | National Natural Science Foundation of China ; Ministry of Industry and Information Technology Project |
| DOI | 10.1016/j.actamat.2020.116576 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National 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 Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000609936600041 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/159121 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Chen, Minghui |
| Affiliation | 1.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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