Abstract
Hydrogen embrittlement (HE) is a crucial problem for many advanced high strength steels (AHSS) used in the automotive industry. To contribute to the microstructural understanding on the resistance against hydrogen embrittlement a complex phase (CP) steel and dual phase (DP) steel were investigated systematically in the present work. Both steels have the same tensile strength, but different microstructures. Thermal desorption spectroscopy (TDS) and electrochemical permeation (EP) were used to study the effect of plastic pre-deformation on the chemical diffusivity and solubility. The results were used to parametrize a fully coupled diffusion-mechanical finite element (FE) model. Constant load tests (CLTs) were applied on electrochemical pre-charged notched samples to evaluate the role of hydrogen charging on the mechanical properties. A local evaluation of the CLTs with the fully coupled FE model revealed local limit strain curves (LSC). Comparing these curves yields a very strong effect of the microstructure on the resistivity on hydrogen embrittlement.
| Original language | English |
|---|---|
| Article number | 140276 |
| Number of pages | 13 |
| Journal | Materials Science and Engineering A |
| Volume | 800 |
| Early online date | 12 Sep 2020 |
| DOIs | |
| Publication status | Published - 7 Jan 2021 |
Keywords
- Complex phase steel
- Dual phase steel
- Finite element modeling
- Hydrogen diffusion
- Hydrogen embrittlement
- Simulation
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Materials Science(all)