TY - GEN
T1 - Effect of hydrogen on fatigue-crack growth of a ferritic-pearlitic low carbon steel
AU - Nagao, Akihide
AU - Dadfarnia, Mohsen
AU - Wang, Shuai
AU - Sofronis, Petros
AU - Nygren, Kelly E.
AU - Robertson, Ian M.
N1 - Funding Information:
The authors gratefully acknowledge the support from the World Premier International Research Center Initiative (WPI), MEXT, Japan, through the International Institute for Carbon-Neutral Energy Research (I2CNER) of Kyushu University. The authors also acknowledge DOE EERE Fuel Cells program, through Grant GO 15045. IMR and SW acknowledges support from the National Science Foundation, through Award No. CMMI-1406462.
Publisher Copyright:
Copyright © 2017 ASME.
PY - 2017
Y1 - 2017
N2 - The effect of external high-pressure H2 gas on fatigue-crack growth behavior has been examined using a ferritic-pearlitic low carbon steel. The presence of hydrogen accelerates the crack growth rate by ∼13 times compared to the uncharged state and shifts the fracture surface morphology from ductile striations to a mixture of "flat" and "quasi-cleavage" features. The common feature found in the microstructure immediately beneath the hydrogen-induced fracture surface is enhanced plasticity in terms of refined dislocation cell structures and dense dislocation bands.
AB - The effect of external high-pressure H2 gas on fatigue-crack growth behavior has been examined using a ferritic-pearlitic low carbon steel. The presence of hydrogen accelerates the crack growth rate by ∼13 times compared to the uncharged state and shifts the fracture surface morphology from ductile striations to a mixture of "flat" and "quasi-cleavage" features. The common feature found in the microstructure immediately beneath the hydrogen-induced fracture surface is enhanced plasticity in terms of refined dislocation cell structures and dense dislocation bands.
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U2 - 10.1115/PVP2017-66273
DO - 10.1115/PVP2017-66273
M3 - Conference contribution
AN - SCOPUS:85034103863
T3 - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
BT - Materials and Fabrication
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2017 Pressure Vessels and Piping Conference, PVP 2017
Y2 - 16 July 2017 through 20 July 2017
ER -