Plasma Nitriding of ISO 5832-1 Stainless Steel at 425 ºC with Intermittent Nitrogen Flow
The aim of this work was to study the influence of varying nitrogen potential during plasma nitriding of stainless steel ISO 5832-1. The control of nitrogen potential was achieved by pulsing the nitrogen flow for different times (01/19, 02/18, and 05/15), where the numbers represent the time (in min...
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2020-11-01
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| Series: | Materials Research |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392020000500214&tlng=en |
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| author | Andrey Matheus Vianna Cristiano Brunetti Marcio Mafra Ricardo Fernando dos Reis Rodrigo Luppinaci Villanova Euclides Alexandre Bernardelli |
| author_facet | Andrey Matheus Vianna Cristiano Brunetti Marcio Mafra Ricardo Fernando dos Reis Rodrigo Luppinaci Villanova Euclides Alexandre Bernardelli |
| author_sort | Andrey Matheus Vianna |
| collection | DOAJ |
| description | The aim of this work was to study the influence of varying nitrogen potential during plasma nitriding of stainless steel ISO 5832-1. The control of nitrogen potential was achieved by pulsing the nitrogen flow for different times (01/19, 02/18, and 05/15), where the numbers represent the time (in minutes) of nitrogen flow on/off, thus creating an intermittent flow of nitrogen during the treatment. For all tested conditions - continuous and pulsed flow of nitrogen - the treatment temperature was kept at 425ºC during 2 and 8 hours. Specimens were characterized by means of X-ray diffraction, scanning electron microscopy, optical microscopy, energy-dispersive X-ray spectroscopy, and nanohardness. Results showed that the layer thickness increases with the increase of total treatment time, and decreased for shorter times of pulsed nitrogen flow. Smaller expansion of the austenite phase, as well as less precipitation of chromium nitrides, were also observed for shorter times of pulsed nitrogen flow. Hence, the use of intermittent nitrogen flow appears to be an efficient approach in order to control the nitrogen concentration within the layer, reducing its brittleness. |
| first_indexed | 2024-04-11T17:02:58Z |
| format | Article |
| id | doaj.art-ce3ed66e923145d898bc4c9f33688bc5 |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-04-11T17:02:58Z |
| publishDate | 2020-11-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-ce3ed66e923145d898bc4c9f33688bc52022-12-22T04:13:07ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392020-11-0123510.1590/1980-5373-mr-2020-0249Plasma Nitriding of ISO 5832-1 Stainless Steel at 425 ºC with Intermittent Nitrogen FlowAndrey Matheus ViannaCristiano Brunettihttps://orcid.org/0000-0001-7436-768XMarcio Mafrahttps://orcid.org/0000-0002-5866-6863Ricardo Fernando dos Reishttps://orcid.org/0000-0001-9221-9410Rodrigo Luppinaci Villanovahttps://orcid.org/0000-0002-1515-6935Euclides Alexandre Bernardellihttps://orcid.org/0000-0003-1991-3056The aim of this work was to study the influence of varying nitrogen potential during plasma nitriding of stainless steel ISO 5832-1. The control of nitrogen potential was achieved by pulsing the nitrogen flow for different times (01/19, 02/18, and 05/15), where the numbers represent the time (in minutes) of nitrogen flow on/off, thus creating an intermittent flow of nitrogen during the treatment. For all tested conditions - continuous and pulsed flow of nitrogen - the treatment temperature was kept at 425ºC during 2 and 8 hours. Specimens were characterized by means of X-ray diffraction, scanning electron microscopy, optical microscopy, energy-dispersive X-ray spectroscopy, and nanohardness. Results showed that the layer thickness increases with the increase of total treatment time, and decreased for shorter times of pulsed nitrogen flow. Smaller expansion of the austenite phase, as well as less precipitation of chromium nitrides, were also observed for shorter times of pulsed nitrogen flow. Hence, the use of intermittent nitrogen flow appears to be an efficient approach in order to control the nitrogen concentration within the layer, reducing its brittleness.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392020000500214&tlng=enstainless steelsISO 5832-1plasma nitridingnitrogen potential |
| spellingShingle | Andrey Matheus Vianna Cristiano Brunetti Marcio Mafra Ricardo Fernando dos Reis Rodrigo Luppinaci Villanova Euclides Alexandre Bernardelli Plasma Nitriding of ISO 5832-1 Stainless Steel at 425 ºC with Intermittent Nitrogen Flow Materials Research stainless steels ISO 5832-1 plasma nitriding nitrogen potential |
| title | Plasma Nitriding of ISO 5832-1 Stainless Steel at 425 ºC with Intermittent Nitrogen Flow |
| title_full | Plasma Nitriding of ISO 5832-1 Stainless Steel at 425 ºC with Intermittent Nitrogen Flow |
| title_fullStr | Plasma Nitriding of ISO 5832-1 Stainless Steel at 425 ºC with Intermittent Nitrogen Flow |
| title_full_unstemmed | Plasma Nitriding of ISO 5832-1 Stainless Steel at 425 ºC with Intermittent Nitrogen Flow |
| title_short | Plasma Nitriding of ISO 5832-1 Stainless Steel at 425 ºC with Intermittent Nitrogen Flow |
| title_sort | plasma nitriding of iso 5832 1 stainless steel at 425 ºc with intermittent nitrogen flow |
| topic | stainless steels ISO 5832-1 plasma nitriding nitrogen potential |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392020000500214&tlng=en |
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