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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ecker, Werner
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Numerical and experimental assessment of liquid metal embrittlement in externally loaded spot welds
- 2023Interstitial Segregation has the Potential to Mitigate Liquid Metal Embrittlement in Ironcitations
- 2023Mechanical load induced hydrogen charging of retained austenite in quenching and partitioning (Q&P) steelcitations
- 2022Hydrogen trapping at retained austenite evaluated in Quenching & Partitioning (Q&P) steel : part I: experimental results
- 2022The interaction of hydrogen with retained austenite in quenching and partitioning (Q&P) and transformation induced plasticity (TRIP) steel
- 2022Hydrogen trapping at retained austenite evaluated in Quenched & Partitioning (Q&P) steel : part II : simulation results
- 2022The role of retained austenite in the hydrogen embrittlement of quenching and partitioning (Q&P) steels
- 2021Grain boundary segregation in Ni-base alloys: A combined atom probe tomography and first principles studycitations
- 2021The effect of hydrogen on the strain induced phase transformation of austenite in automotive quenching and partitioning steel
- 2021Validated multi-physical finite element modelling of the spot welding process of the advanced high strength steel dp1200hdcitations
- 2021Correlative cross-sectional characterization of nitrided, carburized and shot-peened steelscitations
- 2021Liquid Metal Embrittlement of Advanced High Strength Steelcitations
- 2021An atomistic view on Oxygen, antisites and vacancies in the γ-TiAl phasecitations
- 2020Cycled hydrogen permeation through Armco iron – A joint experimental and modeling approachcitations
- 2020Stress relaxation through thermal crack formation in CVD TiCN coatings grown on WC-Co with different Co contentscitations
- 2020Nanoscale stress distributions and microstructural changes at scratch track cross-sections of a deformed brittle-ductile CrN-Cr bilayercitations
- 2020Model-Based Residual Stress Design in Multiphase Seamless Steel Tubescitations
- 2019Residual stress and microstructure evolution in steel tubes for different cooling conditions – Simulation and verificationcitations
- 2019Thermodynamic and mechanical stability of Ni3X-type intermetallic compoundscitations
- 2016In-situ Observation of Cross-Sectional Microstructural Changes and Stress Distributions in Fracturing TiN Thin Film during Nanoindentationcitations
- 2015Size Effects in Residual Stress Formation during Quenching of Cylinders Made of Hot-Work Tool Steelcitations
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article
Liquid Metal Embrittlement of Advanced High Strength Steel
Abstract
In the automotive industry, corrosion protected galvanized advanced high strength steels with high ductility (AHSS-HD) gain importance due to their good formability and their lightweight potential. Unfortunately, under specific thermomechanical loading conditions such as during resistance spot welding galvanized, AHSS-HD sheets tend to show liquid metal embrittlement (LME). LME is an intergranular decohesion phenomenon leading to a drastic loss of ductility of up to 95%. The occurrence of LME for a given galvanized material mainly depends on thermal and mechanical loading. These influences are investigated for a dual phase steel with an ultimate tensile strength of 1200 MPa, a fracture strain of 14% and high ductility (DP1200HD) by means of systematic isothermal hot tensile testing on a Gleeble® 3800 thermomechanical simulator. Based on the experimental findings, a machine learning procedure using symbolic regression is applied to calibrate an LME damage model that accounts for the governing quantities of temperature, plastic strain and strain rate. The finite element (FE) implementation of the damage model is validated based on the local damage distribution in the hot tensile tested samples and in an exemplary 2-sheet resistance spot weld. The developed LME damage model predicts the local position and the local intensity of liquid metal induced cracking in both cases very well.