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High-Temperature Oxidation Behavior of Nano-Structured Layer of SUS430 Stainless Steel
Alternative TitleHigh-Temperature Oxidation Behavior of Nano-Structured Layer of SUS430 Stainless Steel
Chen Chunhuan1; Ren Ruiming1; Chen Pintong2
2015
Source PublicationRARE METAL MATERIALS AND ENGINEERING
ISSN1002-185X
Volume44Issue:9Pages:2330-2333
AbstractA nano-structured layer was prepared by high-energy-shoot-peening on the surface of SUS430 stainless steel (SS). The oxidation behavior of the nano-structured layer in various atmospheres was studied through X-ray diffraction (XRD), thermal analysis (TGA), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), and the effect of surface self nanocrystallization on the oxidation resistance of SUS430 SS was also investigated. The results show that the nano-structured layer is oxidized so violently in the early stage that it gains mass in a straight line rule, but it needs just a short time for being passivated. Thin and compacted oxide film is obtained, the thickness of which is one fourth of that of original surface, resulting in a lower oxidation rate than original surface. Therefore, the total mass of gain is merely one third of the original one, and the oxidation resistance is improved obviously. The reason for this is that the surface self nanocrystallization enlarges the grain boundary area, increases the nucleation rate of oxide, and also provides more diffusion channels for element, consequently promoting the selective oxidation of Cr. The oxide formed in the top surface layer is Fe rich oxide with loose structure, which has little contribution to the oxidation resistance. Beneath the Fe rich oxide, compacted Cr rich oxide forms next to the substrate, which resists the further oxidization of substrate well. Continuous oxide film grows more easily on the nano-structured surface layer than on the original surface. Benefited from its low internal stress and high toughness, the oxide film grown on the nano-structured layer has higher bonding strength to the substrate.
KeywordRESISTANCE stainless steel selective oxidation surface self nanocrystallization
Indexed ByCSCD
Language英语
CSCD IDCSCD:5522653
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/146583
Collection中国科学院金属研究所
Affiliation1.大连交通大学
2.中国科学院金属研究所
Recommended Citation
GB/T 7714
Chen Chunhuan,Ren Ruiming,Chen Pintong. High-Temperature Oxidation Behavior of Nano-Structured Layer of SUS430 Stainless Steel[J]. RARE METAL MATERIALS AND ENGINEERING,2015,44(9):2330-2333.
APA Chen Chunhuan,Ren Ruiming,&Chen Pintong.(2015).High-Temperature Oxidation Behavior of Nano-Structured Layer of SUS430 Stainless Steel.RARE METAL MATERIALS AND ENGINEERING,44(9),2330-2333.
MLA Chen Chunhuan,et al."High-Temperature Oxidation Behavior of Nano-Structured Layer of SUS430 Stainless Steel".RARE METAL MATERIALS AND ENGINEERING 44.9(2015):2330-2333.
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