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http://hdl.handle.net/1843/57016| Type: | Artigo de Periódico |
| Title: | Structural characterization of plasma nitrided interstitial-free steel at different temperatures by SEM, XRD and Rietveld method |
| Authors: | Ana Paula de Andrade Manfridini Geralda Cristina Durães de Godoy Leandro de Arruda Santos |
| Abstract: | Plasma nitriding processes are widely used to improve surface properties of several steels and alloys. In this work, the formation of nitrides in the surface of plasma nitrided IF steels as a function of the temperature was investigated. Three cold-rolled IF steel plates were nitrided for 4 h after shot peening at three different temperatures: 450 °C, 475 °C, and 500 °C. The resultant nitrided layers were then characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Rietveld method, and hardness measurements. Through SEM images, it was possible to visualize two main sublayers: a compound layer and a diffusion zone. Through XRD, two phases were identified in the compound layer, which were ɛ-Fe2–3N and γ′-Fe4N. The diffusion zone presented a ferritic matrix with fine precipitates, possibly α″-Fe16N2. By Rietveld, the calculated quantity of γ′-Fe4N was 68 wt.% for the sample treated at 475 °C and 58 wt.% for the one treated at 500 °C. These values were consistent with the hardness measurements. Thus, it is suggested that higher nitriding temperatures facilitate the decreasing of γ′-Fe4N and, consequently, the increasing of ɛ-Fe2–3N in the compound layer. |
| Subject: | Plasma engineering Aço inoxidável Metais - Superfície |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ENG - DEPARTAMENTO DE ENGENHARIA METALÚRGICA ENGENHARIA - ESCOLA DE ENGENHARIA |
| Rights: | Acesso Aberto |
| metadata.dc.identifier.doi: | https://doi.org/10.1016/j.jmrt.2016.07.001 |
| URI: | http://hdl.handle.net/1843/57016 |
| Issue Date: | 2016 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S2238785416300266?via%3Dihub |
| metadata.dc.relation.ispartof: | Journal of Materials Research and Technology |
| Appears in Collections: | Artigo de Periódico |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Structural characterization of plasma nitrided interstitial-free steel at different temperatures by SEM, XRD and Rietveld method.pdf | 9.54 MB | Adobe PDF | View/Open |
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