Mechanical behaviour of austenitic stainless steel loaded in the aqueous solution of H2SO4 during tensile testing
Introduction/purpose: Stainless steels have excellent corrosion resistance and adequate mechanical properties. However, their use in aggressively hydrogenated environments in the energy industry causes a loss of ductility. This work studied the effect of hydrogen on the mechanical behavior of the...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Defence in Belgrade
2024-10-01
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| Series: | Vojnotehnički Glasnik |
| Subjects: | |
| Online Access: | https://scindeks.ceon.rs/article.aspx?artid=0042-84692404992A |
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| Summary: | Introduction/purpose: Stainless steels have excellent corrosion resistance
and adequate mechanical properties. However, their use in aggressively
hydrogenated environments in the energy industry causes a loss of ductility.
This work studied the effect of hydrogen on the mechanical behavior of the
DINX15CrNiSi25.21/AISI310 austenitic stainless steel loaded in an
aqueous solution of purely sulfuric acid H2SO4 at 1N at room temperature
during tensile testing.
Methods: Experimental characterization techniques are applied to
standardised machining-manufactured tensile specimens which underwent
a series of heat treatments ranging from quenching at 1050°C for 35
minutes to tempering at 680°C for 30 minutes. This is accompanied by a
succession of immersions of these samples by cryogenic quenching cycles
at -196°C for a duration of 1 hour. The hydrogen was electrolytically loaded
in a Pyrex glass cell for various loading times, ranging from 1h00 to 15h00,
with a step of 2h00.
Results: The results showed a reduction in mechanical properties and
plasticity. The electrochemical method confirmed the material's sensitivity
to hydrogen embrittlement, calculating the embrittlement criterion EI (%).
This method indicates a rapid increase in values depending on hydrogen
loading times, with a maximum value of 41.60%.
Conclusion: The study highlights the negative impact of hydrogen on the
mechanical properties of AISI310 stainless steel, emphasising the need for
reduced hydrogen exposure in steel applications. |
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| ISSN: | 0042-8469 2217-4753 |