Hydrogen diffusion and hydrogen provoked degradation in the trip 800 Mn-Si-Al steel
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F16%3A86099849" target="_blank" >RIV/61989100:27360/16:86099849 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Hydrogen diffusion and hydrogen provoked degradation in the trip 800 Mn-Si-Al steel
Original language description
The presented paper deals with hydrogen diffusion and hydrogen provoked degradation in the TRIP 800 Mn-Si-Al steel with increased aluminum content. The steel was studied after standard heat treatment including two step annealing - an intercritical annealing and an annealing in the range of bainitic transformation. A part of specimens was submitted to a plastic deformation in tension (5 and 10 %) in order to modify both structure and mechanical properties. Microstructure of the steel consisted predominantly of ferrite, bainite and retained austenite, the amount of which decreased with increasing extent of the plastic deformation. Hydrogen diffusion was studied by electrochemical permeation method. Hydrogen diffusion coefficients were calculated using the "time lag" method. The lowest values of hydrogen diffusion coefficients were always observed for the first buildup transient, while the highest values were recorded for the second build-up transient due to the less intense hydrogen trapping. As to the impact of deformation, the highest hydrogen diffusion coefficients were observed after 5 % tensile deformation. Subsurface hydrogen concentration reached maximal value approx. 14 mass ppm. Hydrogen embrittlement of the steel was studied using tensile tests after previous electrolytic charging in diluted sulfuric acid solution. Hydrogen embrittlement manifested itself mainly by a drop of elongation at fracture. As to the fracture morphology, hydrogen embrittlement resulted in a change of fracture mode from transgranular ductile fracture to transgranular cleavage fracture with an appearance of "fish eyes" initiated on aluminum rich non-metallic inclusions.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
JG - Metallurgy, metal materials
OECD FORD branch
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Result continuities
Project
<a href="/en/project/LO1203" target="_blank" >LO1203: Regional Materials Science and Technology Centre - Feasibility Program</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
METAL 2016: conference proceedings : (reviewed version) : 25th Anniversary International Conference on Metallurgy and Materials : May 25th-27th 2016, Hotel Voronez I, Brno, Czech Republic, EU
ISBN
978-80-87294-67-3
ISSN
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e-ISSN
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Number of pages
6
Pages from-to
759-764
Publisher name
Tanger
Place of publication
Ostrava
Event location
Brno
Event date
May 25, 2016
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000391251200122