Understanding the interplay of multiple mechanisms of hydrogen embrittlement using experiments and simulations

14th. Jul. 2023, ICAMS Special Seminar, Ruhr-Universität Bochum IC 02-718

Start: 14th. Jul. 2023. 02:00 p.m.
End: 14th. Jul. 2023. 03:00 p.m.

Dhiraj Kumar Mahajan Indian Institute of Technology Ropar, India

Alexander Hartmaier ICAMS, RUB

The present work focuses on developing an integrating approach for investigating the role of multiple (microstructure-dependent) mechanisms responsible for hydrogen embrittlement (HE) using experiments and simulations. HE leads to early failure of metals under monotonic and fatigue loading which is so far not well understood. However, multiple microstructure-dependent mechanisms such as Hydrogen Enhanced DEcohesion (HEDE), and Hydrogen Enhanced Dislocation Emission (HELP) are widely recognized as responsible mechanisms for HE. In the presentation, experimental results from uniaxial tests, fatigue crack initiation, and short crack propagation studies will be discussed first with a focus on highlighting the role of individual mechanisms. Further, simulation results using crystal plasticity finite element framework will be discussed, highlighting the role of microstructure to promote individual mechanisms towards hydrogen accumulation at grain boundaries or crack front, leading to early failure.

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