Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/9759
Title: Low-temperature nitriding of 38CrMoAl steel with a nanostructured surface layer induced by surface mechanical attrition treatment
Authors: Tong, WP
Han, Z
Wang, LM
Lu, J
Lu, K
Keywords: 38CrMoAl steel
Nanocrystalline materials
Nitriding
Surface mechanical attrition treatment
Wear resistance
Issue Date: 2008
Publisher: Elsevier
Source: Surface and coatings technology, 2008, v. 202, no. 20, p. 4957-4963 How to cite?
Journal: Surface and coatings technology 
Abstract: A nanocrystalline surface layer was fabricated on a 38CrMoAl steel plate by means of a surface mechanical attrition treatment (SMAT). The average grain size in the top surface layer (10??gm thick) is about 10?nm, and the grain size stability can be maintained up to 450??XC. The effect of the surface nanocrystalline layer on the gas nitriding process at a lower temperature was investigated by using structural analysis and wear property measurements. The surface nanocrystallization evidently enhances nitriding kinetics and promotes the formation of an ultrafine polycrystalline compound layer. The results of the investigation showed that this new gas nitriding technique can effectively increase the hardness and wear resistance of the resulting surface layer in comparison with conventional nitriding, demonstrating a significant advancement for materials processing.
URI: http://hdl.handle.net/10397/9759
ISSN: 0257-8972
EISSN: 1879-3347
DOI: 10.1016/j.surfcoat.2008.04.085
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