Demonstration of a chamber for strain mapping of steel specimens under mechanical load in a hydrogen environment by synchrotron radiation

Matthew Connolly; Jun-Sang Park; Peter Bradley; Damian Lauria; Andrew Slifka; Elizabeth Drexler

doi:10.1063/1.5012541

Demonstration of a chamber for strain mapping of steel specimens under mechanical load in a hydrogen environment by synchrotron radiation

Rev Sci Instrum. 2018 Jun;89(6):063701. doi: 10.1063/1.5012541.

Authors

Matthew Connolly¹, Jun-Sang Park², Peter Bradley¹, Damian Lauria¹, Andrew Slifka¹, Elizabeth Drexler¹

Affiliations

¹ National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
² Argonne National Laboratory, 9700 Cass Avenue, Building 401, Lemont, Illinois 60439, USA.

PMID: 29960547
DOI: 10.1063/1.5012541

Abstract

We demonstrate a hydrogen gas chamber suitable for lattice strain measurements and capturing radiographs of a steel specimen under a mechanical load using high energy synchrotron x-rays. The chamber is suitable for static and cyclic mechanical loading. Experiments were conducted at the 1-ID-E end station of the Advanced Photon Source, Argonne National Laboratory. Diffraction patterns show a high signal-to-noise ratio suitable for lattice strain measurements for the specimen and with minimal scattering and overlap from the gas chamber manufactured from aluminum. In situ radiographs of a specimen in the hydrogen chamber show the ability to track a growing crack and to map the lattice strain around the crack with high spatial and strain resolution.