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20110001_2237

© Cyril FRESILLON/ESPCI/CNRS Images

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20110001_2237

A strip of material is deformed in an oven

A strip of material is deformed in an oven. It is subjected to torsion stress, clearly visible in bright colors under polarized light. These colors fade away within a few minutes when hot: the material has taken a new, permanent shape.

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