Cargando…
Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test
The change in the value of the breaking energy is discussed here for selected steel grades used in building structures after subjecting the samples made of them to episodes of heating in the steady-state heating regime and then cooling in simulated fire conditions. These changes were recorded based...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8304635/ https://www.ncbi.nlm.nih.gov/pubmed/34300840 http://dx.doi.org/10.3390/ma14143922 |
_version_ | 1783727382627090432 |
---|---|
author | Maslak, Mariusz Pazdanowski, Michal Stankiewicz, Marek Zajdel, Paulina |
author_facet | Maslak, Mariusz Pazdanowski, Michal Stankiewicz, Marek Zajdel, Paulina |
author_sort | Maslak, Mariusz |
collection | PubMed |
description | The change in the value of the breaking energy is discussed here for selected steel grades used in building structures after subjecting the samples made of them to episodes of heating in the steady-state heating regime and then cooling in simulated fire conditions. These changes were recorded based on the instrumented Charpy impact tests, in relation to the material initial state. The S355J2+N, 1H18N9T steels and also X2CrNiMoN22-5-3 duplex steel were selected for detailed analysis. The fire conditions were modelled experimentally by heating the samples and then keeping them for a specified time at a constant temperature of: 600 °C (first series) and 800 °C (second series), respectively. Two alternative cooling variants were investigated in the experiment: slow cooling of the samples in the furnace, simulating the natural fire progress, without any external extinguishing action and cooling in water mist simulating an extinguishing action by a fire brigade. The temperature of the tested samples was set at the level of −20 °C and alternatively at the level of +20 °C. The conducted analysis is aimed at assessing the risk of sudden, catastrophic fracture of load-bearing structure made of steel degraded as a result of a fire that occurred previously with different development scenarios. |
format | Online Article Text |
id | pubmed-8304635 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-83046352021-07-25 Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test Maslak, Mariusz Pazdanowski, Michal Stankiewicz, Marek Zajdel, Paulina Materials (Basel) Article The change in the value of the breaking energy is discussed here for selected steel grades used in building structures after subjecting the samples made of them to episodes of heating in the steady-state heating regime and then cooling in simulated fire conditions. These changes were recorded based on the instrumented Charpy impact tests, in relation to the material initial state. The S355J2+N, 1H18N9T steels and also X2CrNiMoN22-5-3 duplex steel were selected for detailed analysis. The fire conditions were modelled experimentally by heating the samples and then keeping them for a specified time at a constant temperature of: 600 °C (first series) and 800 °C (second series), respectively. Two alternative cooling variants were investigated in the experiment: slow cooling of the samples in the furnace, simulating the natural fire progress, without any external extinguishing action and cooling in water mist simulating an extinguishing action by a fire brigade. The temperature of the tested samples was set at the level of −20 °C and alternatively at the level of +20 °C. The conducted analysis is aimed at assessing the risk of sudden, catastrophic fracture of load-bearing structure made of steel degraded as a result of a fire that occurred previously with different development scenarios. MDPI 2021-07-14 /pmc/articles/PMC8304635/ /pubmed/34300840 http://dx.doi.org/10.3390/ma14143922 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Maslak, Mariusz Pazdanowski, Michal Stankiewicz, Marek Zajdel, Paulina Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test |
title | Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test |
title_full | Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test |
title_fullStr | Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test |
title_full_unstemmed | Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test |
title_short | Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test |
title_sort | post-fire susceptibility to brittle fracture of selected steel grades used in construction industry—assessment based on the instrumented impact test |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8304635/ https://www.ncbi.nlm.nih.gov/pubmed/34300840 http://dx.doi.org/10.3390/ma14143922 |
work_keys_str_mv | AT maslakmariusz postfiresusceptibilitytobrittlefractureofselectedsteelgradesusedinconstructionindustryassessmentbasedontheinstrumentedimpacttest AT pazdanowskimichal postfiresusceptibilitytobrittlefractureofselectedsteelgradesusedinconstructionindustryassessmentbasedontheinstrumentedimpacttest AT stankiewiczmarek postfiresusceptibilitytobrittlefractureofselectedsteelgradesusedinconstructionindustryassessmentbasedontheinstrumentedimpacttest AT zajdelpaulina postfiresusceptibilitytobrittlefractureofselectedsteelgradesusedinconstructionindustryassessmentbasedontheinstrumentedimpacttest |