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Precipitation hardening

Arun Prakash's picture

Atom probe informed atomistic simulations reveal the importance of local interface curvature

The interaction of dislocations with precipitates is an essential strengthening mechanism in metals, as exemplified by the superior high-temperature strength of Ni-base superalloys. Here we use atomistic simulation samples generated from atom probe tomography data of a single crystal superalloy to study the interactions of matrix dislocations with a gamma' precipitate in molecular dynamics simulations.

Curvature matters!

In a recent article in Acta Materialia ("Atom probe informed simulations of dislocation-precipitate interactions reveal the importance of local interface curvature" http://www.sciencedirect.com/science/article/pii/S1359645415002268 ) we showed how the interface curvature influences dislocation - precipitate interactions.

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