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In Situ Neutron Transmission Bragg Edge Measurements of Strain Fields Near Fatigue Cracks Grown in Air and in Hydrogen

Published

Author(s)

Matthew Connolly, Peter Bradley, Andrew Slifka, Elizabeth S. Drexler

Abstract

In situ transmission Bragg edge measurements of the strain field were performed near cracks grown in air and in hydrogen. Through the use of a novel test chamber which is capable of pressurization with hydrogen gas, and amenable to neutron-scattering measurements, fatigue cracks were grown in X70 steel specimens at the NG-6 neutron-imaging beam line at the NIST Center for Neutron Research. The measured strain fields are presented and discussed in the context of proposed mechanisms of hydrogen-assisted fatigue crack growth.
Proceedings Title
Proceeding of the International Hydrogen Conference 2016
Conference Dates
September 26-29, 2016
Conference Location
Jackson Hole, WY, US

Keywords

Fatigue, Hydrogen Environment Assisted Cracking, X70, Steel

Citation

Connolly, M. , Bradley, P. , Slifka, A. and Drexler, E. (2017), In Situ Neutron Transmission Bragg Edge Measurements of Strain Fields Near Fatigue Cracks Grown in Air and in Hydrogen, Proceeding of the International Hydrogen Conference 2016, Jackson Hole, WY, US, [online], https://doi.org/10.1115/1.861387, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=921611 (Accessed July 22, 2024)

Issues

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Created August 14, 2017, Updated April 8, 2022