EFFECT OF HIGH - PRESSURE HYDROGEN ON FATIGUE PROPERTIES OF 34CRMO4 STEEL

1 ČÍŽEK Petr
Co-authors:
1 KANDER Ladislav 1 KUBOŇ Zdeněk
Institution:
1 MATERIAL AND METALLURGICAL RESEARCH Ltd., Pohraniční 693/31, Ostrava - Vítkovice, Czech Republic, EU, petr.cizek@mmvyzkum.cz
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
626-631
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
36 views / 18 downloads
Abstract

The paper deals with the effect of high-pressure hydrogen on fatigue crack growth rate of low alloy 34CrMo4 steel used for hydrogen cylinders production. Testing was performed on pre-cracked 1/2 C(T) specimens, which were dynamically loaded both in the air and in pure hydrogen environment at pressure 15 MPa. Fatigue crack growth was measured using potential method measuring system. Hydrogen effect was assessed from different curves fatigue crack growth rate in both environments. Fracture surface analysis subsequently confirmed significant effect of hydrogen on fatigue properties of this material.

Keywords: Fatigue crack growth rate, potential method, hydrogen autoclave applications
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