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Effect of Hydrogen on Fatigue-Crack Growth of a Ferritic-Pearlitic Low Carbon Steel

[+] Author Affiliations
Akihide Nagao

JFE Steel Corporation, Kawasaki, Japan

Shuai Wang, Ian M. Robertson

University of Wisconsin-Madison, Madison, WI

Kelly E. Nygren

University of Illinois at Urbana, Madison, WI

Mohsen Dadfarnia, Petros Sofronis

University of Illinois at Urbana, Urbana, IL

Paper No. PVP2017-66273, pp. V06BT06A048; 6 pages
  • ASME 2017 Pressure Vessels and Piping Conference
  • Volume 6B: Materials and Fabrication
  • Waikoloa, Hawaii, USA, July 16–20, 2017
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5800-4
  • Copyright © 2017 by ASME


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.

Copyright © 2017 by ASME



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