Paper Titles
Preface
Thickness Scaling of Forming Limit Curves
p.1
Work Hardening of Dual Phase Steel in Subsequent Tensile Testing with Post-Necking Large Pre-Strain
p.11
Crystal Plasticity Finite-Element Simulations of Cup Drawing of a ZX10 Magnesium Alloy Sheet
p.21
In Situ EBSD Characterisation of Anisotropic Creep Behaviour in a Thick AA2139 Part during In-Forming Artificial Ageing
p.29
Microstructural Modification and Bendability Improvement in 1300 MPa Steel via Induction Surface Heat Treatment
p.39
The Interaction of n- and r-Values and Total Elongation in Forming Limit Curves’ Theories
p.47
Theoretical and Experimental Forming Limit Evaluation of High-Strength Steels up to 1500 MPa
p.57
Evaluation and Comparison of a few Methods for the Strain-Path Correction of FLCs
p.67

In Situ EBSD Characterisation of Anisotropic Creep Behaviour in a Thick AA2139 Part during In-Forming Artificial Ageing

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Abstract:

The present study aims to investigate the anisotropic creep behaviour of aluminium alloy 2139 during artificial ageing, through in situ thermomechanical loadings under Electron Backscattered Diffraction (EBSD). EBSD analysis enabled the characterisation of microstructural parameters and the identification of grain misorientations which were further correlated with macroscopic creep strain. In situ analyses were conducted within a Scanning Electron Microscope (SEM) using a micro‑tensile stage that allows simultaneous heating and mechanical loading. Creep tests were performed at 160°C under 50, 100 and 150 MPa along three different orientations in order to investigate the creep behaviour of the alloy. Kernel Average Misorientation (KAM) maps showed a progressive increase of the average KAM values for the different loading conditions, reaching a saturation value after 10 hours. Ex situ tensile tests were conducted on creep‑aged specimens using Digital Image Correlation (DIC). The main mechanical property evolutions (averaged across all orientations) are a 45 % increase in yield stress, a 10 % increase in ultimate tensile stress and a reduction in ductility, characterised by a notable decrease in elongation. Further works will focus on the result repeatability, as well as on the influence of prior deformation on the creep strain.

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Periodical:

Solid State Phenomena (Volume 388)

Pages:

29-37

DOI:

https://doi.org/10.4028/p-x19oZa

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Online since:

April 2026

Authors:

Calixte Gautier*, Pierre Antoine Dubos, David Gloaguen, Baptiste Girault, Maxime Rollin

Keywords:

Aluminum Alloy, Anisotropy, Creep-Ageing, EBSD, Grain Misorientations, In Situ Tests

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Creative Commons CC BY 4.0

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* - Corresponding Author

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