Influence of processing conditions on structural characteristics of hybrid plasma surface alloyed austenitic stainless steel.

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dc.contributor.author Sun, Yong
dc.contributor.author Haruman, E.
dc.date.accessioned 2010-02-09T09:31:25Z
dc.date.available 2010-02-09T09:31:25Z
dc.date.issued 2008-03
dc.identifier.citation Sun, Y. and Haruman, E. (2008) Influence of processing conditions on structural characteristics of hybrid plasma surface alloyed austenitic stainless steel. Surface and Coatings Technology, 202 (17) pp.4069-4075. en
dc.identifier.issn 0257-8972
dc.identifier.uri http://hdl.handle.net/2086/3392
dc.description.abstract A hybrid plasma surface alloying process has recently been developed for austenitic stainless steels to improve their surface hardness, wear resistance and corrosion resistance. The process is carried out in nitrogen and methane gas mixtures at temperatures below 450°C and facilitates the simultaneous incorporation of nitrogen and carbon into the surfaces of austenitic stainless steels, forming a dual layer structure with an extremely hard nitrogen-enriched layer on top of a hard carbon-enriched layer. The present paper discusses the influence of three most important processing parameters, i.e., gas composition, temperature and time, on the structural characteristics of the alloyed zones produced on AISI 321 stainless steel, in terms of layer morphology, growth kinetics and chromium compound precipitation. It was found that the development of the alloyed layers is diffusion-controlled, and under proper processing conditions, a precipitation-free dual-layer structure can be produced, with nitrogen and carbon dissolved in the relevant layer forming N-expanded austenite and C-expanded austenite respectively. Based on the experimental results, a threshold temperature–time curve has been established for the investigated austenitic stainless steel. en
dc.language.iso en en
dc.publisher Elsevier en
dc.subject plasma surface alloying en
dc.subject stainless steel en
dc.subject nitriding en
dc.subject carburising en
dc.subject expanded austenite en
dc.title Influence of processing conditions on structural characteristics of hybrid plasma surface alloyed austenitic stainless steel. en
dc.type Article en
dc.identifier.doi http://dx.doi.org/10.1016/j.surfcoat.2008.02.022
dc.researchgroup Emerging Technologies Research Centre
dc.peerreviewed Yes en
dc.ref2014.selected 1366964034_0510680166614_15_2


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