Mechanical behaviour of austenitic stainless steel loaded in the aqueous solution of H2SO4 during tensile testing

  • Amar Abboub Mustapha Stambouli University, Faculty of Sciences and Technology, Department of Mechanical Engineering, Mascara, People's Democratic Republic of Algeria https://orcid.org/0009-0004-0158-5837
  • Ahmed Aboura Ahmed Zabana University, Faculty of Sciences and Technology, Department of Mechanical Engineering, Relizane, People's Democratic Republic of Algeria https://orcid.org/0009-0005-3509-2026
  • Khaled Benmahdi Mustapha Stambouli University, Faculty of Sciences and Technology, Department of Civil Engineering, Laboratory for the Study of Structures and Mechanics of Materials, Mascara, People's Democratic Republic of Algeria https://orcid.org/0000-0002-8244-5817
  • Mohamed Sadoun Mustapha Stambouli University, Faculty of Sciences and Technology, Department of Civil Engineering, Laboratory for the Study of Structures and Mechanics of Materials, Mascara, People's Democratic Republic of Algeria https://orcid.org/0009-0008-2314-9402
  • Mokhtar Belkacem Mustapha Stambouli University, Faculty of Sciences and Technology, Department of Mechanical Engineering, Mascara, People's Democratic Republic of Algeria https://orcid.org/0009-0004-2533-9622
  • Djameleddine Semsoum Mustapha Stambouli University, Faculty of Sciences and Technology, Department of Mechanical Engineering, Mascara, People's Democratic Republic of Algeria https://orcid.org/0009-0009-8304-9072
DOI: https://doi.org/10.5937/vojtehg72-49964
Keywords: austenitic stainless steel, heat treatments, hydrogen pre-loaded, mechanical properties, hydrogen embrittlement (HE), faces

Abstract


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.

Author Biographies

Ahmed Aboura, Ahmed Zabana University, Faculty of Sciences and Technology, Department of Mechanical Engineering, Relizane, People's Democratic Republic of Algeria

 

 

Khaled Benmahdi, Mustapha Stambouli University, Faculty of Sciences and Technology, Department of Civil Engineering, Laboratory for the Study of Structures and Mechanics of Materials, Mascara, People's Democratic Republic of Algeria

 

 

Mohamed Sadoun, Mustapha Stambouli University, Faculty of Sciences and Technology, Department of Civil Engineering, Laboratory for the Study of Structures and Mechanics of Materials, Mascara, People's Democratic Republic of Algeria

 

 

Mokhtar Belkacem, Mustapha Stambouli University, Faculty of Sciences and Technology, Department of Mechanical Engineering, Mascara, People's Democratic Republic of Algeria

 

 

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Published
2024/11/17
Issue
Vol. 72 No. 4 (2024): October - December
Section
Original Scientific Papers

Copyright (c) 2024 Amar Abboub, Ahmed Aboura, Khaled Benmahdi, Mohamed Sadoun, Mokhtar Belkacem, Djameleddine Semsoum

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