High-pressure strengthening in ultrafine-grained metals

Nature, Published online: 24 February 2020; doi:10.1038/s41586-020-2036-z

High-pressure diamond anvil cell experiments reveal that compression strengthening of nanocrystalline nickel increases as its grain sizes decrease to 3 nanometres, owing to dislocation hardening and suppression of grain boundary plasticity.

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