THE INFLUENCE OF HYDROGEN ON THE MECHANICAL PROPERTIES OF TRIP 780 STEEL

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F17%3A10238152" target="_blank" >RIV/61989100:27350/17:10238152 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27360/17:10238152

Výsledek na webu

<a href="https://www.metalconference.eu/files/uploads/02/METAL2017_conference_proceedings_content.pdf" target="_blank" >https://www.metalconference.eu/files/uploads/02/METAL2017_conference_proceedings_content.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

THE INFLUENCE OF HYDROGEN ON THE MECHANICAL PROPERTIES OF TRIP 780 STEEL

Popis výsledku v původním jazyce

The susceptibility to the hydrogen embrittlement of commercial heat of TRIP 780 steel of the type C-Mn-Si was studied on previously hydrogenated samples by a slow strain rate tensile tests (SSRT) in the initial state and in the state after 5% deformation in the longitudinal and transverse directions relative to the rolling direction. Samples were hydrogenated in 0.1N sulfuric acid solution with the addition of KSCN. Due to the transformation of retained austenite to deformation-induced martensite after 5% deformation, an increase of yield strength of 230 MPa, a tensile strength of 30 MPa and elongation at fracture decrease by 6.5 % occurred in contrast with the initial state without hydrogen. The presence of hydrogen in the steel in the initial state caused a decrease of steel strength from 900 MPa to 753 MPa, and a significant reduction in elongation at fracture from 34 % to 6 %. Hydrogen present in the samples after the 5% deformation had an effect on an increase of the yield strength by 60 MPa, a decrease in the tensile strength by 100 MPa, while the elongation at fracture reached only 2.5 %. There were no differences found in the mechanical properties of the samples taken in the longitudinal and transverse direction relative to the rolling direction. Fracture surfaces of the tensile test bars were subjected to fractographic analysis. For hydrogenated samples, the proportion of brittle fracture and quasi-cleavage fracture increased.

Název v anglickém jazyce

THE INFLUENCE OF HYDROGEN ON THE MECHANICAL PROPERTIES OF TRIP 780 STEEL

Popis výsledku anglicky

The susceptibility to the hydrogen embrittlement of commercial heat of TRIP 780 steel of the type C-Mn-Si was studied on previously hydrogenated samples by a slow strain rate tensile tests (SSRT) in the initial state and in the state after 5% deformation in the longitudinal and transverse directions relative to the rolling direction. Samples were hydrogenated in 0.1N sulfuric acid solution with the addition of KSCN. Due to the transformation of retained austenite to deformation-induced martensite after 5% deformation, an increase of yield strength of 230 MPa, a tensile strength of 30 MPa and elongation at fracture decrease by 6.5 % occurred in contrast with the initial state without hydrogen. The presence of hydrogen in the steel in the initial state caused a decrease of steel strength from 900 MPa to 753 MPa, and a significant reduction in elongation at fracture from 34 % to 6 %. Hydrogen present in the samples after the 5% deformation had an effect on an increase of the yield strength by 60 MPa, a decrease in the tensile strength by 100 MPa, while the elongation at fracture reached only 2.5 %. There were no differences found in the mechanical properties of the samples taken in the longitudinal and transverse direction relative to the rolling direction. Fracture surfaces of the tensile test bars were subjected to fractographic analysis. For hydrogenated samples, the proportion of brittle fracture and quasi-cleavage fracture increased.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LO1203" target="_blank" >LO1203: Regionální materiálově technologické výzkumné centrum - Program udržitelnosti</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL 2017: conference proceedings : 26th International Conference on Metallurgy and Materials : (reviewed version) : May 24th-26th 2017, Hotel Voroněž I, Brno, Czech Republic, EU

ISBN

978-80-87294-79-6

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

6

Strana od-do

1027-1032

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

24. 5. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000434346900164