Influence of cathodic-protection-induced hydrogenation on mechanical properties of two ship hull plate steels

• Autorzy: Jakubowski M. , Modelski L. , Podbereski M.
• Języki publikacji: EN

Abstrakty

EN

Tensile testing and Charpy V impact testing results for two ship hull steels: an ordinary strength steel grade A and a higher strength steel grade AH32 each in both as-received conditions and in hydrogenated by zinc protector in salt water conditions. For both steels the hydrogenation has slightly increased yield stress (Re) and elongation (A) and has not influencedultimatetensilestrength(Rm), while reduction of area has been unchanged (A steel) or even decreased (AH32 steel) due to the hydrogenation. The effect of the hydrogenation on Charpy tests results has evidently been beneficial: the increase of Charpy energy andof percent fibrosity (ductility) of fracture appearance as well as a shift down of ductile-brittle transitiontemperatures have been observed. It seems that the present practice to evaluate the mechanical properties of ship steels by testing the specimens without hydrogenation leads to conservative results. The Authors have hypothesized that the beneficial effect of hydrogenation can occur if the deformation rate is fastenough, the notch is sharp enough (although only for specimens hydrogenated in unstressed conditions) and hydrogen concentration is moderate

• Wydawca: -
• Czasopismo: Polish Maritime Research
• Rocznik: 2008
• Tom: 15
• Numer: 1
• Opis fizyczny: p.65-71,fig.,ref.

Twórcy

autor

Jakubowski M.

• Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology, Narutowicza 11/12, 80-952 Gdansk, Poland

autor

Modelski L.

• Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology, Narutowicza 11/12, 80-952 Gdansk, Poland

autor

Podbereski M.

• Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology, Narutowicza 11/12, 80-952 Gdansk, Poland

Bibliografia

• 1. M. Jakubowski: Causes of the crack in the bottom plating of m/s „Beskid”, An expert opinion (unpublished) (in Polish), Gdansk University of Technology, Gdansk 2003
• 2. M. Jakubowski: Could local buckling of bottom plating of a small tanker be an immediate reason of crack in the structure?(in Polish), Proc. 21-th Symposium on Fatigue and Fracture of Materials and Structures, Bydgoszcz-Pieczyska, May 23-26, 2006, pp. 139-147
• 3. D. Le Friant, B. Bayle, C. Adam, Th. Magnin: Stress corrosion cracking of X52 pipeline steel in deoxygenated dilute aqueous solution, Proc. Int. Conf. on Environmental Degradation of Engineering Materials, 19-23 Sept. 1999, Gdansk-Jurata, Poland, Vol. I, pp. 168-173
• 4. E. Lunarska, D, Samatowicz, E. Sitko: Hydrogen embrittlement of 30HGSNA aircraft steel in Cl- containing environments, Proc. Int. Conf. on Environmental Degradation of Engineering Materials, 19-23 Sept. 1999, Gdansk-Jurata, Poland, Vol. I, pp. 334-339
• 5. K. Pokhodnya, V.I. Shvachko, S.M. Stepanyuk: Experimental modeling of cold cracking of structural steels and welds, Proc. Int. Conf. on Environmental Degradation of Engineering Materials, 19-23 Sept. 1999, Gdansk-Jurata, Poland, Vol. I, pp. 351-356
• 6. A. Zieliński, P. Domżalicki: Hydrogen degradation of high-strength low-alloyed steels, J. of Materials Processing Technology, 2003, Vol. 133, pp.230-235
• 7. P. Domżalicki, E. Łunarska, D. Kwiatkowska, H. Wichary, J. Birn: Effect of cathodic polarization in microorganisms-containing seawater on mechanical properties of steels (in Polish), Ochrona przed korozją, 2004, No. 12, pp. 338-340
• 8. M. Śmiałowski: Hydrogen in steels, publishers (in Polish). WNT, Warsaw 1961
• 9. G.V. Karpenko, Strength of steels in corrosive environment, publishers (in Russian). Mashgiz, Moscow-Kiev 1963
• 10. L.S. Moroz, B.B. Chechulin: Hydrogen embrittlement of metals(in Russian), Publishers: Metallurgia, Moscow 1967
• 11. E. Lunarska: Effect of hydrogen on the iron plasticity (in Polish), Scientific Bulletins of the Stanislaw Staszic Universityof Mining and Technology, No. 997, series: Metallurgy and Foundry Practice, Bulletin 101,(monography), Kraków 1984
• 12. Yu. I. Archakov: Hydrogen corrosion of steels (in Russian), publishers.: Metallurgia, Moscow 1985
• 13. J. Juraszek, J. Nowak, Z. Jurasz: Effect of corrosion on mechanical properties of ship hull plate steels, Proc. Int. Conf. on Environmental Degradation of Engineering Materials, 19-23 Sept. 1999, Gdansk-Jurata, Poland, Vol. II, pp.73-76
• 14. J. Toribio, V. Kharin: Load dynamics effects on crack-tip hydrogen accumulation in metals, Proc. Int. Conf. on Environmental Degradation of Engineering Materials, 19-23 Sept. 1999, Gdansk-Jurata, Poland, Vol. I, pp. 399-404
• 15. G.V. Karpenko: Serviceability of structural materials in aggressive environments (in Russian), publishers: Naukova Dumka, Kiev 1985
• 16. D.L. Newhouse: Relationship between Charpy impact energy, fracture appearance and test temperature in alloy steels. Welding Journal, 1963, no. 3, pp. 105s-114s
• 17. M. Szkodo, Z. Zaczek: Application of D.L. Newhouse method in estimation of the energy to initiate fracture in quenched and tempered 18G2A steel (in Polish). Scientific Bulletins of GdanskUniversity of Technology, No. 425, Series: Mechanics, No. LV, pp.11-20
• 18. J.D.G. Sumpter, J. Bird, J.D. Clarke, A.J. Caudrey: Fracture toughness of ship steels, The Transactions of The Royal Institution of Naval Architects, Vol. 131, 1988, pp.169-177
• 19. S.E. Kovchyk, E.M. Morozov: Fracture Mechanics and material strength (in Russian), Vol. 3, Publishers: Naukova Dumka, Kiev 1988

Identyfikatory

DOI

10.2478/v10012-007-0054-5