Strengthening and weakening by repeated dynamic impact in microcrystals and nanocrystals

Abstract : Experiments on micrograined (mg) and nanocrystalline (nc) Ni revealed strengthening and weakening following repeated dynamic impact. The strengthening in mg-Ni arises from intragranular dislocations without a significant change in grain size, whereas the weakening in nc-Ni is due to concurrent grain growth. The strength of mg and nc-Ni samples after deformation settles at similar to 900 MPa, with differing contributions from intragranular dislocations and grain sizes.
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Materials Science and Engineering: A, Elsevier, 2015, 639, pp.97-102. 〈10.1016/j.msea.2015.04.086〉
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Soumis le : mercredi 26 avril 2017 - 18:27:29
Dernière modification le : mercredi 12 septembre 2018 - 01:27:47

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Thangaraju Shanmugasundaram, Emmanuel Bouzy, A. H. Chokshi. Strengthening and weakening by repeated dynamic impact in microcrystals and nanocrystals. Materials Science and Engineering: A, Elsevier, 2015, 639, pp.97-102. 〈10.1016/j.msea.2015.04.086〉. 〈hal-01514956〉

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