Imperial College London
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DrEmilioMartinez-Paneda

Faculty of Engineering, Department of Civil and Environmental Engineering

Visiting Reader
 
 
 
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Contact

 

+44 (0)20 7594 8188e.martinez-paneda Website

 
 
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Location

 

249Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zafra:2023:10.1016/j.msea.2023.144885,
author = {Zafra, A and Álvarez, G and Benoit, G and Henaff, G and Martinez-Pañeda, E and Rodríguez, C and Belzunce, J},
doi = {10.1016/j.msea.2023.144885},
journal = {Materials Science and Engineering: A},
pages = {1--14},
title = {Hydrogen-assisted fatigue crack growth: Pre-charging vs in-situ testing in gaseous environments},
url = {http://dx.doi.org/10.1016/j.msea.2023.144885},
volume = {871},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We investigate the implications of conducting hydrogen-assisted fatigue crack growth experiments in a hydrogen gas environment (in-situ hydrogen charging) or in air (following exposure to hydrogen gas). The study is conducted on welded 42CrMo4 steel, a primary candidate for the future hydrogen transport infrastructure, allowing us to additionally gain insight into the differences in behavior between the base steel and the coarse grain heat affected zone. The results reveal significant differences between the two testing approaches and the two weld regions. The differences are particularly remarkable for the comparison of testing methodologies, with fatigue crack growth rates being more than one order of magnitude higher over relevant loading regimes when the samples are tested in a hydrogen-containing environment, relative to the pre-charged samples. Aided by finite element modelling and microscopy analysis, these differences are discussed and rationalized. Independent of the testing approach, the heat affected zone showed a higher susceptibility to hydrogen embrittlement. Similar microstructural behavior is observed for both testing approaches, with the base metal exhibiting martensite lath decohesion while the heat affected zone experienced both martensite lath decohesion and intergranular fracture.
AU  - Zafra,A
AU  - Álvarez,G
AU  - Benoit,G
AU  - Henaff,G
AU  - Martinez-Pañeda,E
AU  - Rodríguez,C
AU  - Belzunce,J
DO  - 10.1016/j.msea.2023.144885
EP  - 14
PY  - 2023///
SN  - 0921-5093
SP  - 1
TI  - Hydrogen-assisted fatigue crack growth: Pre-charging vs in-situ testing in gaseous environments
T2  - Materials Science and Engineering: A
UR  - http://dx.doi.org/10.1016/j.msea.2023.144885
UR  - http://hdl.handle.net/10044/1/104001
VL  - 871
ER  -
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