Understanding of failure mechanisms of the oxide scales formed on nanocrystalline coatings with different Al content during cyclic oxidation

doi:10.1016/j.actamat.2020.116576

IMR OpenIR

	Understanding of failure mechanisms of the oxide scales formed on nanocrystalline coatings with different Al content during cyclic oxidation
	Yang, Shasha 1,2; Yang, Lanlan 4; Chen, Minghui 3; Wang, Jinlong 3; Zhu, Shenglong 1; Wang, Fuhui 3
通讯作者	Chen, Minghui(mhchen@mail.neu.edu.cn)
	2021-02-15
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	205 页码:13
摘要	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.
关键词	Oxidation Nanocrystalline coatings Rumpling Thermal stress
资助者	National Natural Science Foundation of China ; Ministry of Industry and Information Technology Project
DOI	10.1016/j.actamat.2020.116576
收录类别	SCI
语种	英语
资助项目	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研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000609936600041
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：35[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/159121
专题	中国科学院金属研究所
通讯作者	Chen, Minghui
作者单位	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
推荐引用方式 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.