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Journal Articles Materials Science and Engineering: A Year : 2015

Strengthening and weakening by repeated dynamic impact in microcrystals and nanocrystals

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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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Dates and versions

hal-01514956 , version 1 (26-04-2017)

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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, 2015, 639, pp.97-102. ⟨10.1016/j.msea.2015.04.086⟩. ⟨hal-01514956⟩
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