Hydrogen Enhanced Intergranular Cracking -- A Phenomenological Multiscale Constitutive Model

TL;DR

This paper introduces a multiscale constitutive model for hydrogen-enhanced intergranular cracking in metals, combining crystal plasticity and phenomenological approaches to better predict failure mechanisms influenced by corrosive environments.

Contribution

It presents a novel multiscale model integrating micromechanisms and cohesive zone modeling to simulate hydrogen embrittlement effects in metals.

Findings

Model shows good agreement with experimental data.

Captures key effects observed during hydrogen embrittlement experiments.

Provides a comprehensive framework for predicting hydrogen-related cracking.

Abstract

Hydrogen enhanced cracking is one of the many failure mechanisms in metals depending on the corrosive environment. In the presented work, a multiscale constitutive model has been presented for hydrogen enhanced intergranular cracking in metals. The proposed constitutive model takes into account one of the many micromechanisms, i.e. Slip based micromechanisms active in the grain interior using crystal plasticity theory while sensitized grain boundary zone has been modelled by proposing a phenomenological constitutive model motivated from cohesive zone modelling approach. Model has been assessed through experimental data available in the literature and shows a good agreement. Model is able to capture the effects found during experiments.