On the suitability of slow strain rate tensile testing for assessing hydrogen embrittlement susceptibility
Accepted version
Peer-reviewed
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Authors
Martínez-Pañeda, Emilio https://orcid.org/0000-0002-1562-097X
Harris, ZD
Fuentes-Alonso, S
Scully, JR
Burns, JT
Abstract
The onset of sub-critical crack growth during slow strain rate tensile testing (SSRT) is assessed through a combined experimental and modeling approach. A systematic comparison of the extent of intergranular fracture and expected hydrogen ingress suggests that hydrogen diffusion alone is insufficient to explain the intergranular fracture depths observed after SSRT experiments in a Ni-Cu superalloy. Simulations of these experiments using a new phase field formulation indicate that crack initiation occurs as low as 40% of the time to failure. The implications of such sub-critical crack growth on the validity and interpretation of SSRT metrics are then explored.
Description
Keywords
Hydrogen embrittlement, Environment-assisted cracking, SSRT, Phase field fracture
Journal Title
Corrosion Science
Conference Name
Journal ISSN
0010-938X
1879-0496
1879-0496
Volume Title
163
Publisher
Elsevier BV
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All rights reserved