An SEM compatible plasma cell for in situ studies of hydrogen-material interaction

A. Massone*, A. Manhard, W. Jacob, A. Drexler, W. Ecker, A. Hohenwarter, S. Wurster, D. Kiener

*Korrespondierende/r Autor/in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikelBegutachtung


An in situ hydrogen (H) plasma charging and in situ observation method was developed to continuously charge materials, while tensile testing them inside a scanning electron microscope (SEM). The present work will introduce and validate the setup and showcase an application allowing high-resolution observation of H-material interactions in a Ni-based alloy, Alloy 718. The effect of charging time and pre-straining was investigated. Fracture surface observation showed the expected ductile microvoid coalescence behavior in the uncharged samples, while the charged ones displayed brittle intergranular and quasi-cleavage failure. With the in situ images, it was possible to monitor the sample deformation and correlate the different crack propagation rates with the load-elongation curves. H-charging reduced the material ductility, while increasing pre-strain decreased hydrogen embrittlement susceptibility due to the possible suppression of mechanical twinning during the tensile test and, therefore, a reduction in H concentration at grain and twin boundaries. All the presented results demonstrated the validity of the method and the possibility of in situ continuously charging of materials with H without presenting any technical risk for the SEM.

FachzeitschriftReview of Scientific Instruments
PublikationsstatusVeröffentlicht - 10 Apr 2020
Extern publiziertJa

ASJC Scopus subject areas

  • Werkstoffwissenschaften (insg.)

Fields of Expertise

  • Advanced Materials Science


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