Issue |
EPJ Web Conf.
Volume 250, 2021
DYMAT 2021 - 13th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
|
|
---|---|---|
Article Number | 01036 | |
Number of page(s) | 10 | |
Section | Experimental Techniques | |
DOI | https://doi.org/10.1051/epjconf/202125001036 | |
Published online | 09 September 2021 |
https://doi.org/10.1051/epjconf/202125001036
Characterization of mechanical behaviour of aluminum powders under fast dynamic conditions
1
MINES ParisTech, PSL Research University, MAT – Centre des Matériaux, CNRS UMR 7633, BP 87, 91003 Evry, France
2
MINES ParisTech, PSL Research University, CEMEF – Centre de Mise en Forme des Matériaux, CNRS UMR 7635, - 06904 Sophia Antipolis cedex
3
TOYAL EUROPE, Route de Lescun F-64490 Accous, France
* Corresponding author: francesco.delloro@mines-paristech.fr
Published online: 9 September 2021
Cold spray is a process belonging to the thermal spray family, characterized by relatively low temperatures and high particle velocities. Upon impact, particles undergo large plastic deformation at solid state in dynamic regime up to 109 s-1. The knowledge of powder behaviour in such conditions is essential to catch key phenomena in cold spray and a necessary step for a correct process modelling. However, little is known on mechanical behaviour of feed-stock powders when submitted to cold spray conditions. In this study, an approach focused on single particles combining laser shock induced impact, namely LASHPOL (LAser SHock POwder Launcher), and quasi-static compression was therefore developed. This method was applied in this study on spherical Aluminium powders but can work with any other powder material. The mechanical behaviour of powders was characterized and used to fit the parameters of Johnson-Cook constitutive model, by means of finite element inverse method. The combination of static and dynamic tests resulted in an original characterization of powder, which revealed having a different mechanical behaviour than the corresponding bulk material.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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