Evaluation of susceptibility of high-strength steels to hydrogen delayed cracking

• Autorzy: Świeczko-Żurek B. , Sobieszczyk S. , Ćwiek J. , Zieliński A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Purpose of this paper is evaluation of susceptibility of high-strength structural steels to hydrogen delayed cracking. Design/methodology/approach: Susceptibility to hydrogen delayed cracking of high-strength alloy steels have been made under constant load in hydrogen generating environments. Test were carried out using round notched specimens subjected to axial tensile load being equivalence to 75-96% of maximum force obtained from a tensile tests in air. Two constructional middle carbon steel - grades 26H2MF and 34HNM were tested in used (worn out) mineral engine oil at temperature of 80°C. One low carbon weldable steel grade - 14HNMBCu was investigated in sea-water under cathodic polarization at room temperature. Presence or lack of cracking within 200 hours was chosen as a measure of susceptibility to hydrogen delayed cracking. Fracture modes of failed samples were examined with the use of scanning electron microscope. Findings: All tested steels reveal high resistance to hydrogen degradation under constant load. Hydrogen delayed cracking does not occur until the load level is as high as flow stress (yield strength). Research limitations/implications: Further research should be taken to reveal the exact mechanism of crack initiation. Practical implications: Tested steels could be safely utilized within elastic range of stress in hydrogen generating environments. Originality/value: Under the critical load and hydrogen concentration notched samples premature failed and hydrogen-enhanced localised plasticity (HELP) model is a viable degradation mechanism.

Słowa kluczowe

EN

crack resistance; high strength steel; hydrogen embrittlement; hydrogen delayed cracking

PL

odporność na pękanie; stal wysokowytrzymała; kruchość wodorowa; pęknięcia wodorowe zwłoczne

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 18, nr 1-2
• Strony: 243--246
• Opis fizyczny: Bibliogr. 16 poz., rys., tab.

Twórcy

autor

Świeczko-Żurek B.

• Faculty of Mechanical Engineering, Gdańsk University of Technology, ul. Narutowicza 11/12, 80-952 Gdańsk, Poland

autor

Sobieszczyk S.

• Faculty of Mechanical Engineering, Gdańsk University of Technology, ul. Narutowicza 11/12, 80-952 Gdańsk, Poland

autor

Ćwiek J.

• Faculty of Mechanical Engineering, Gdańsk University of Technology, ul. Narutowicza 11/12, 80-952 Gdańsk, Poland

autor

Zieliński A.

• Faculty of Mechanical Engineering, Gdańsk University of Technology, ul. Narutowicza 11/12, 80-952 Gdańsk, Poland

Bibliografia

• [1] ASM Handbook. Vol. 11 Failure Analysis and Prevention. ASM Int., 1986.
• [2] N. Eliaz, A. Shachar, B. Tal, D. Eliezer, Characteristic of hydrogen embrittlement, stress corrosion cracking and tempered martensite embrittlement in high-strength steels, Engineering Failure Analysis 9 (2002) 176-184.
• [3] S.P. Lynch, Failures of structures and components by environmentally assisted cracking, Engineering Failure Analysis, 2 (1994) 77-90.
• [4] A. Zieliński, E. Łunarska, P. Michalak, W, Serbiński, Strength degradation of 26H2MF and 34HNM steels used in ship engines: hydrogen factor, Materials Science, 6(2004) 822-830.
• [5] J.V. Sharp, J. Billingham, M.J. Robinson, The risk of high-strength steels in jack-ups in seawater, Marine Structures 14(2001) 537-551.
• [6] K. Banerjee, U.K. Chatterjee, Hydrogen embrittlement of a HSLA-100 steel in seawater. ISIJ Int. 1(1999), 47-55.
• [7] M. Śmiałowski, Hydrogen in Steels, Pergamon Press, Oxford, 1962.
• [8] R.A. Oriani, J.P. Hirth, M. Smialowski (eds.), Hydrogen degradation of ferrous alloys, Noyes Publ. Park, Ridge, USA, 1985.
• [9] H.K. Birnbaum, Mechanisms of hydrogen-related fracture of metals. Proc. Int. Conf. „Environment-Induced Cracking of Metals”, National Association of Corrosion Engineers, Houston, Texas, USA, 1988, 21-29.
• [10] PN-75/H-84024 Steel for elevated temperature applications.
• [11] PN-89/H-84030/04 Alloy constructional steel for quenching and tempering or case hardening.
• [12] 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.
• [13] PN-EN 10002-1:2004 Metallic materials - Tensile testing - Part 1 - Method of test at ambient temperature.
• [14] PN-EN 1321:2000 Destructive tests on welds in metallic materials - Macroscopic and microscopic examination of welds.
• [15] PN-EN 2832:2001 Aerospace series - Hydrogen embrittlement of steels - Notched specimen test.
• [16] PN-66/C-06502. Substitute seawater