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Diffusion behavior of Cr in gradient nanolaminated surface layer on an interstitial-free steel
Xie, S. L.; Wang, Z. B.; Lu, K.
2019-03-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume35Issue:3Pages:460-464
AbstractNanolaminated structures composed of low-angle grain boundaries (LAGBs) possess high thermal stability. In this paper, a gradient nanolaminated (GNL) surface layer with smooth finish was fabricated on an interstitial-free steel by means of surface mechanical rolling treatment. Microstructural observations demonstrated that the average lamellar thickness is about 80 nm in the topmost surface layer and increases with increasing depth. High thermal stability was confirmed in the GNL surface layer after annealing at 500 degrees C. Diffusion measurements showed that effective diffusivity of Cr in GNL layer is 4-6 orders of magnitude higher than lattice diffusivity within the temperature range from 400 to 500 degrees C. This might be attributed to numerous LAGBs or dislocation structures with a higher energy state in the GNL surface layer. This work demonstrates the possibility to advanced chromizing (or other surface alloying) processes of steels with formation of GNL surface layer, so that a thicker alloyed surface layer with a stable nanostructure is achieved. (C) 2018 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordGradient nanolaminated structure Interstitial-free steel Diffusion Low-angle grain boundary Surface mechanical rolling treatment
Indexed BySCI
Language英语
WOS IDWOS:000454506800030
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81350
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Xie, S. L.,Wang, Z. B.,Lu, K.. Diffusion behavior of Cr in gradient nanolaminated surface layer on an interstitial-free steel[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(3):460-464.
APA Xie, S. L.,Wang, Z. B.,&Lu, K..(2019).Diffusion behavior of Cr in gradient nanolaminated surface layer on an interstitial-free steel.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(3),460-464.
MLA Xie, S. L.,et al."Diffusion behavior of Cr in gradient nanolaminated surface layer on an interstitial-free steel".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.3(2019):460-464.
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