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2017 | 24 | 1 |

Tytuł artykułu

Corrosion fatigue crack propagation rate characteristics for weldable ship and offshore steels with regard to the influence of loading frequency and saltwater temperature

Autorzy

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
After Vosikovsky (1975), the corrosion fatigue crack growth rate (CFCGR) characteristics have been divided into three regions. The region-III rates are very close to mechanical fatigue crack growth rates. CFCGR formulae, including the long-crack length effect (in region I only), the loading frequency effect (in region II only), and the saltwater temperature effect, have been proposed. It has been assumed that CFCGR is proportional to f –k, where f is the loading frequency and k is a constant. The averaged k-value for all steels of yield stress (YS) below 500 MPa, usually with ferrite-pearlite microstructures, is higher than that for YS > 500 MPa, usually with quenched and tempered microstructures. The temperature effect does not appear in region I below room temperature. In the remaining cases, that is, in region I for elevated temperatures and in region II for both low and elevated temperatures, the CFCGR increases with increasing temperature. Under a potential of –0.8 V, a long-crack-length effect, qualitatively similar to analogous effect for free corrosion conditions, appears

Słowa kluczowe

Wydawca

-

Rocznik

Tom

24

Numer

1

Opis fizyczny

p.88-99,fig.,ref.

Twórcy

  • Gdansk University of Technology, 11/12 Narutowicza St., 80-233 Gdansk, Poland

Bibliografia

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  • 6. Jakubowski M. (2007). A model of corrosion fatigue crack growth in ship and offshore steels. Fatigue Fract. Engng Mater. Struct., 30, 682-688.
  • 7. Scott P. M., Silvester D. R. V. (1975). The influence of seawater on fatigue crack propagation in structural steel. Department of Energy, UK OSRP Technical Report 3/03.
  • 8. Morgan H. G., Thorpe T. W. (1981). An introduction to crack growth testing in the UK OSRP and its relevance to the design of offshore structures. Proc. Fatigue in Offshore Structures, Thomas Telford Ltd, London,pp.515.
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  • 10. Jakubowski M. (1982). Influence of saltwater on fatigue crack growth rates in shipbuilding steels. Zeszyty Naukowe PG, No.344, 121130 (in Polish).
  • 11. Jakubowski M. (1986). A study crack length effect on the fatigue crack growth rate for ordinary shipbuilding steel in saltwater. 5th Intl Symp. Offshore Mechanics and Arctic Engineering, Tokyo, ASME Book No. 100194, 212217.
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  • 14. Zhang Y-H., Zettlemoyer N., Tubby P.J. (2012). Fatigue crack growth rates of mooring chain steels. Proc. ASME 2012 31st Intl Conf. Ocean, Offshore and Arctic Engineering, OMAE2012-84223, pp. 1-10.
  • 15. Hudak Jr.,S.J., Feiger J.H., Patton J.A.,(2010) The effect of loading frequency on corrosion-fatigue crack growth in high strength riser materials. Proc. ASME 2010 29th
  • Intl Conf. Ocean, Offshore and Arctic Engineering, OMAE2010-20705, pp.1-10.
  • 16. Marvasti M,H., Chen W., Kania R., Worthingham R. and Van Boven G. (2010) Frequency dependence of fatigue and corrosion fatigue crack growth rate. Proc. 8th Int. Pipeline Conference, IPC2010-31007, 1-7.
  • 17. Nagai K., Iwata M., Yaima H., Yamamoto Y., Fujimoto Y. (1976). Effect of cycle frequency, mean stress, temperature and cathodic protection on fatigue crack growth in 3% salt-water. J. Society of Naval Architects Japan, 140, 255261.
  • 18. Nibbering J. J. W. (1983). Behaviour of mild steel under very low frequency loading in sea water. Corrosion Science,.23, 645662.
  • 19. Scott P. M., Thorpe T. W., Silvester D. R. V. (1983). Rate determining process for corrosion fatigue crack growth in ferritic steels in seawater. Corrosion Science, 23, 559575.
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  • 25. Barsom J. M. (1971). Mechanism of corrosion fatigue below KI SCC . Int. J. of Fracture Mechanics, 7, 165-182. 26. Barsom J. M. (1971). Corrosion fatigue crack propagation below KI SCC. Engineering Fracture Mechanics, 3, 15-25. 27. Oberparleitner W., Schutz W. (1988). Calculation of crack growth in welded specimens under seawater conditions in order to predict fatigue life of offshore components. Werkstoffe und Korrosion, 39, 369-378, (in German).
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Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

bwmeta1.element.agro-abe05234-0664-4deb-8eee-93f6c11e5a54
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