Experimental assessment of nanovoids growth

P.-O. Barrioz (1) , J. Hure (1) , B. Tanguy (1)

1 CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire)

The growth of nanovoids in crystalline metallic material is assessed experimentally as a function of the applied macroscopic plastic strain, stress triaxiality and crystal orientation. Nanovoids - of diameter ranging from 20 to 80nm - are generated by performing heavy-ion irradiation on austenitic steel, leading to a model material constituted of a well-defined nano voids distribution. Pre- and poststraining Transmission Electron Microscope (TEM) observations allow to quantify the growth and the evolution of aspect ratio as a function of plastic strain. Size and crystal orientation effects are evaluated. Experiments are compared to the results of crystal plasticity finite element simulations.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]; Physique Nucléaire Théorique [nucl-th]

P.-O. Barrioz, J. Hure, B. Tanguy. Experimental assessment of nanovoids growth. ICTAM 24th - 24th International Conference of Theoretical and Applied Mechanics, Aug 2016, Montreal, Canada. ⟨cea-02442320⟩