Influence of impurity level and processing parameters on local and macroscopic necking and failure parameters for 6000 series aluminium alloys
Abstract
This work presents an experimental workflow which enables measuring local necking and fracture strains during uniaxial and plane strain tensile tests, using digital image correlation and optimized sample geometry. These parameters are compared with macroscopic parameters from these tensile tests, and to classical formability indicators, such as limit dome height or bending tests. This workflow is applied on a large experimental database of 6000 series Aluminium alloys with varying Fe and Mn content, representative of changing impurity levels. It is found that locally resolved parameters show a different sensitivity to the tested processing variations when compared to macroscopic indicators. Besides, the bending angle at failure is strongly correlated with the local fracture strain in plane strain tension and the limit dome height is correlated to the local necking strain. The results of this work demonstrate that using local strain measurements helps to better characterize sheet formability and emphasise the importance of considering the local behaviour at the fracture location to evaluate the effect of impurities on formability. The application of this workflow on our large experimental database evidences the effect of addition of Fe, Mn, and of cooling rate and changing the homogenization recipe, on the necking and fracture properties.
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BibTeX
@article{guerin2026influence,
title = {{Influence of impurity level and processing parameters on local and macroscopic necking and failure parameters for 6000 series aluminium alloys}},
author = {Pierre Guerin and Fanny Mas and Frédéric de Geuser and Pierre Lhuissier and Alexis Deschamps},
journal = {Materials \& Design},
year = {2026},
month = sep,
doi = {10.1016/j.matdes.2026.115930},
url = {https://hal.science/hal-05763299v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Influence of impurity level and processing parameters on local and macroscopic necking and failure parameters for 6000 series aluminium alloys
AU - Pierre Guerin
AU - Fanny Mas
AU - Frédéric de Geuser
AU - Pierre Lhuissier
AU - Alexis Deschamps
PY - 2026
DA - 2026/09/24
JO - Materials & Design
DO - 10.1016/j.matdes.2026.115930
UR - https://hal.science/hal-05763299v1
AB - This work presents an experimental workflow which enables measuring local necking and fracture strains during uniaxial and plane strain tensile tests, using digital image correlation and optimized sample geometry. These parameters are compared with macroscopic parameters from these tensile tests, and to classical formability indicators, such as limit dome height or bending tests. This workflow is applied on a large experimental database of 6000 series Aluminium alloys with varying Fe and Mn content, representative of changing impurity levels. It is found that locally resolved parameters show a different sensitivity to the tested processing variations when compared to macroscopic indicators. Besides, the bending angle at failure is strongly correlated with the local fracture strain in plane strain tension and the limit dome height is correlated to the local necking strain. The results of this work demonstrate that using local strain measurements helps to better characterize sheet formability and emphasise the importance of considering the local behaviour at the fracture location to evaluate the effect of impurities on formability. The application of this workflow on our large experimental database evidences the effect of addition of Fe, Mn, and of cooling rate and changing the homogenization recipe, on the necking and fracture properties.
SN - 0261-3069
SN - 0264-1275
ER -