In situ characterization of AA1050 recrystallization kinetics using high temperature nanoindentation testing

Publication date: 15 August 2018
Source:Materials & Design, Volume 152
Author(s): Paul Baral, Mathilde Laurent-Brocq, Gaylord Guillonneau, Jean-Michel Bergheau, Jean-Luc Loubet, Guillaume Kermouche
Static recrystallization kinetics, at 300 °C, of a hot rolled commercial purity aluminum alloy AA1050 has been investigated using high temperature nanoindentation. Annealing treatments were achieved inside a nanoindentation device to measure corresponding hot nanohardness versus time. Clear evidences of recrystallization phenomenon were deduced from both hardness decrease and pop-in events on load-displacement curves. The recrystallized fraction for increasing annealing time was compared to conventional post mortem characterizations – i.e. EBSD and Vickers hardness. A good agreement was found between in situ and post mortem characterization methods. High temperature nanoindentation is proved to be a powerful tool for fast characterization of materials' recrystallization kinetics.

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