Three-dimensional imaging of hydrogen blister in iron with neutron tomography

Griesche, Axel; Dabah, Eitan; Kannengießer, Thomas; Kardjilov, Nikolay; Hilger, André; Manke, Ingo

doi:10.1016/j.actamat.2014.06.034

Cited by 113 publications

(62 citation statements)

References 45 publications

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“…This damage may be mitigated by understanding and controlling the factors that contribute to the observed effects. Steels' resistance to HIC is closely related to their metallurgical structure [4][5][6][7][8][9][10][11][12][13][14][15]. The interfaces of the band structure usually act as sinks for hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Effect of microstructures and inclusions on hydrogen-induced cracking and blistering of A537 steel

Cao

Wang

et al. 2015

Materials Science and Engineering: A

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Section: Introductionmentioning

confidence: 99%

Effect of microstructures and inclusions on hydrogen-induced cracking and blistering of A537 steel

Cao

Wang

et al. 2015

Materials Science and Engineering: A

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“…Cracking may occur during solidification of the melt pool, and solidification cracking is an important issue in welding, casting and solidification-related additive manufacturing processes. If undetected, the cracking defects can act as stress concentration sites which could lead to premature failure via fatigue, as well as offer favourable sites for hydrogen assisted cracking123 and stress corrosion cracking4. Because of this, solidification cracking defects are widely studied and have been the subject of investigation for several decades456789101112131415.…”

mentioning

confidence: 99%

Initiation and growth kinetics of solidification cracking during welding of steel

Aucott

Huang

Dong

et al. 2017

Sci Rep

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Solidification cracking is a key phenomenon associated with defect formation during welding. To elucidate the failure mechanisms, solidification cracking during arc welding of steel are investigated in situ with high-speed, high-energy synchrotron X-ray radiography. Damage initiates at relatively low true strain of about 3.1% in the form of micro-cavities at the weld subsurface where peak volumetric strain and triaxiality are localised. The initial micro-cavities, with sizes from 10 × 10−6 m to 27 × 10−6 m, are mostly formed in isolation as revealed by synchrotron X-ray micro-tomography. The growth of micro-cavities is driven by increasing strain induced to the solidifying steel. Cavities grow through coalescence of micro-cavities to form micro-cracks first and then through the propagation of micro-cracks. Cracks propagate from the core of the weld towards the free surface along the solidifying grain boundaries at a speed of 2–3 × 10−3 m s−1.

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“…Researchers at BAM recently demonstrated that neutron tomography could resolve hydrogen blister formation and dissolution in iron with a hydrogen concentration sensitivity of about 5 kmol m -3 [7]. This important feasibility study will open the door to further research on embrittlement.…”

Section: Hydrogen Embrittlementmentioning

confidence: 96%