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Propriétés mécaniques des matériaux à grains ultrafins: un ... - IM2NP

Propriétés mécaniques des matériaux à grains ultrafins: un ... - IM2NP

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Mécanismes aux faibles tailles de<br />

<strong>grains</strong> (< 10 nm)<br />

σ<br />

σ<br />

σ<br />

σ<br />

GB sliding<br />

Enhanced GB<br />

diffusion<br />

σ<br />

σ<br />

σ<br />

σ<br />

Grain<br />

rotation<br />

Triple<br />

j<strong>un</strong>ction<br />

cavitation<br />

σ<br />

σ<br />

σ<br />

δ<br />

σ<br />

Dislocation<br />

emission<br />

at GB’s<br />

GB<br />

migration<br />

Reproduit avec autorisation: D. Gianola, T. Rupert, K. Hemker “Experiments in grain bo<strong>un</strong>dary<br />

dominated materials”. Bra<strong>un</strong>wald, Switzerland, September 2007.<br />

samedi 15 mars 2008

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