Hydrogen degradation of high strength weldable steels

• Autorzy: Ćwiek J.
• Języki publikacji: EN

Abstrakty

EN

Hydrogen degradation phenomenon of high strength steels is presented in the paper. Models and mechanisms of hydrogen degradation were characterizes and discussed. Two steel grades S690Q and their SA Wand SMA W welded joints were investigated. Susceptibility to hydrogen degradation at room temperature, in sea water under open circuit potential, and cathodic polarization was evaluated with the use of mechanical test under monotonically increasing static load. Measures of hydrogen degradation were determined. Mechanisms of hydrogen degradation were detected on the basis of SEM observation of samples fracture surfaces. Models and mechanisms of hydrogen degradation occurring in investigated cases, in relation to material structure, concentration and distribution of hydrogen, stress and strain state were proposed.

Słowa kluczowe

EN

high strength steel; welded joints; hydrogen degradation

• Wydawca: Politechnika Gdańska
• Czasopismo: Advances in Materials Science
• Rocznik: 2007
• Tom: Vol. 7, nr 1(11)
• Strony: 133--139
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Ćwiek J.

• Gdańsk University ofTechnology, Faculty ofMechanical Engineering, Gdańsk, Poland

Bibliografia

• [1] Ćwiek J.: Hydrogen assisted cracking of high-strength weldable steels in sea-water. Journal of Materials Processing Technology 164-165 (2005) pp. 1007-1013.
• [2] ASM Handbook. Vol. 1"1 Failure Analysis and Prevention. ASM Int., 1986.
• [3] Eliaz N., Shachar A., Tal B., Eliezer D.: Characteristic of hydrogen embrittlement, stress corrosion cracking and tempered martensite embrittlement in high-strength steels. Engineering Failure Analysis 9 (2002) pp. 176-184.
• [4] Lynch S.P.: Failures of structures and components by environmentally assisted cracking. Engineering Failure Analysis 2 (1994) pp. 77-90.
• [5] Sharp lV., Billingham J., Robinson M.J.: The risk of high-strength steels in jack-ups in seawater. Marine Structures 14 (2001) pp. 537-551.
• [6] Timmins P.F.: Solutions to hydrogen attack in steels, AMS Int., 1997.
• [7] Birnbaum H.K., Robertson I. M., Sofronis P., Teter D.: Mechanisms of hydrogen related fracture. A review, Proc. 2nd Int. Conf. Corrosion Deformation Interaction, The Institute of Materials, London, 1997, pp. 172-195.
• [8] Hirth J.P.: Effects of hydrogen on the properties of iron and steel, Metallurgical Transactions A, 11A (1980) pp. 861-890.
• [9] PN-EN 10137-2:2000 Plates and wide flats made of high yield strength structural steels in the quenched and tempered or precipitation hardened conditions - Delivery conditions for quenched and tempered steels.
• [10] PN-EN ISO 7539-7:2000 Corrosion of metals and alloys - Stress corrosion testing - Part 7: Slaw strain rate testing.
• [11] PN-66/C-06502. Substitute seawater.