Characterization of the Healability of Aluminium Alloys Produced by Laser Powder Bed Fusion (L-PBF) Using X-ray Nanoholotomography at Synchrotron (ESRF)

Gheysen, Julie;Pyka, Grzegorz;Hannard, Florent;Julie Villanova;Simar, Aude;et.al.
(2022) The Minerals, Metals & Materials Society - 151st Annual Meeting & Exhibition — Location: Los Angeles (27.February.2022)

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Abstract
In aeronautic applications, overloads can damage parts and lead to their replacement. Self-healing materials, i.e. with the ability to repair internal damage, could increase the part’s lifetime. While polymer-based systems have dominated the field of self-healing materials, self-healing of metals remains an important challenge because of the slow diffusion at room temperature. In this research, two healable aluminum alloys produced by L-PBF are developed based on: - diffusion of healing agents towards the free surfaces of the damage voids during heat treatment; - melting of an eutectic phase which flows towards the damage. The healability of these two strategies was studied on damaged specimens using in-situ heating coupled with nanoholotomography at European Synchrotron Radiation Facility (ESRF). This 4D nano-imaging highlighted the progressive filling of the damage sites, allowing to optimise the healing temperature and showing the potential of these two healable aluminium alloys.
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Gheysen, J., Pyka, G., Hannard, F., Julie Villanova, Nothomb, N., David Tingaud, Arseenko, M., & Simar, A. (2022). Characterization of the Healability of Aluminium Alloys Produced by Laser Powder Bed Fusion (L-PBF) Using X-ray Nanoholotomography at Synchrotron (ESRF). The Minerals, Metals & Materials Society - 151st Annual Meeting & Exhibition, Los Angeles. https://hdl.handle.net/2078.5/267601