Modification to a testing assembly to enable strain-life measurements in pressurized hydrogen gas

Published

August 25, 2023

Author(s)

Peter Bradley, May Ling Martin, Matthew Connolly, Robert Amaro, Damian Lauria, Andrew Slifka

Abstract

Strain-controlled fully-reversed fatigue testing, or strain-life testing, provides critical information on material lifetime and damage response. Strain-life data in hydrogen gas environments is missing in the literature and could provide valuable insights into hydrogen effects on the mechanical response of metals such as steels. We adapted existing hydrogen-gas-environment mechanical-testing equipment, which had been designed only for tensile loads, to accommodate the large compressive loads needed to perform strain-life testing. The considerations of these adaptations are discussed. Successful strain-life testing data was acquired from a 4130 pressure vessel steel.

Citation

Review of Scientific Instruments

Issue

94

Pub Type

Journals

Download Paper

https://doi.org/10.1063/5.0131798

Local Download

Keywords

Extensometer, Machining, Materials properties, Mechanical properties, Crack initiation and detection, Fatigue testing, Strain gauge, Stress strain relations

Citation

Bradley, P. , Martin, M. , Connolly, M. , Amaro, R. , Lauria, D. and Slifka, A. (2023), Modification to a testing assembly to enable strain-life measurements in pressurized hydrogen gas, Review of Scientific Instruments, [online], https://doi.org/10.1063/5.0131798, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935654 (Accessed April 28, 2024)