|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Ultrafine-grained and Heterostructured Materials (UFGH XII)
||The impact of hydrogen on the deformation behavior of nanostructured iron and nickel
||Marlene Kapp, Jürgen Eckert, Reinhard Pippan, Oliver Renk
|On-Site Speaker (Planned)
Hydrogen is becoming one of the corner stones for the energy revolution. However, it is known for over a century, that hydrogen tends to embrittle even ductile metals such as iron or nickel. Because of its enormous diffusivity even at ambient temperatures, making a direct detection or interaction with defects difficult, the reasons for the embrittlement and altered deformation behavior remain controversially discussed. Even less is known for the highest strength levels. To this end we study here the effect of hydrogen on the deformation behavior of nanostructured metals. Nickel and iron with grain sizes between 100 and 200 nm prepared by high-pressure torsion serve as model materials. Altering the charging parameters, different hydrogen levels up to 0.2 at.% can be introduced. The effects on the deformation behavior at different temperatures and strain rates, being the center of discussion, are studied at small and large plastic strains after hydrogen charging.
||Mechanical Properties, Other, Other