Hydrogen embrittlement of metals: on the role of plasticity

Hydrogen is widely recognized as a clean and efficient energy carrier, playing a crucial role in the transition toward a net-zero emissions future. In the coming decades, large-scale initiatives in the production, transportation, storage, and use of green hydrogen are expected to grow substantially. However, hydrogen, as the smallest and most elusive element in the universe, interacts with metallic materials in ways that can weaken their strength and durability. This phenomenon, known as hydrogen embrittlement, has been a subject of scientific inquiry for over 150 years, leading to more than 6,000 research publications and numerous theories.

This lecture will delve into a critical aspect of hydrogen embrittlement: hydrogen-plasticity interaction. Plasticity refers to how materials deform permanently under stress, a process driven by microscopic defects called dislocations. The lecture will highlight how hydrogen interacts with dislocations, enhancing their generation and movement. These changes can ultimately lead to the premature failure of metallic materials.

The lecture is an obligatory teaching test for those applying for admittance as docent and it should be possible for students and others with basic academic education in the relevant field to follow it. The lecture lasts 40-45 minutes with subsequent discussion. The lecture will be given in English.