Hydrogen effects on cathodically charged twinning-induced plasticity steel

Hydrogen effects on cathodically charged twinning-induced plasticity steel

Cathodically charged twinning-induced plasticity (TWIP) steel was evaluated to determine the effects of brief hydrogen charging on the tensile properties. Ductile fracture mechanisms and bulk tensile properties were unaffected by hydrogen contents of up to 9.5ppm. However, surface microcracks were o...

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Veröffentlicht in:Scripta materialia 2012-06, Vol.66 (12), p.956-959
Hauptverfasser: Ronevich, J.A., Kim, S.K., Speer, J.G., Matlock, D.K.
Format: Artikel
Sprache:eng
Schlagworte:
Austenitic steels
Charging
Cracking (fracturing)
Fracture
Fracture mechanics
Hydrogen embrittlement
Microcracks
Plasticity
Steels
Tensile properties
Tension test
Twinning induced plasticity steels (TWIP)
TWIP steels
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Beschreibung
Zusammenfassung:Cathodically charged twinning-induced plasticity (TWIP) steel was evaluated to determine the effects of brief hydrogen charging on the tensile properties. Ductile fracture mechanisms and bulk tensile properties were unaffected by hydrogen contents of up to 9.5ppm. However, surface microcracks were observed to depths comparable to calculated hydrogen penetration depths, up to 6μm for samples charged for 6h. These results highlighted the limited applicability of using pre-charged tensile samples to assess the potential for delayed cracking of austenitic TWIP steels.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2011.12.012