A discrete dislocation dynamics study of precipitate bypass mechanisms in nickel-based superalloys
Sabyasachi Chatterjee,
Yang Li,
Giacomo Po
Abstract:Order strengthening in nickel-based superalloys is associated with the extra stress required for dislocations to bypass the γ precipitates distributed in the γ matrix. Depending on the operating conditions and microstructure, a rich variety of bypass mechanism has been identified, with various shearing and Orowan looping processes gradually giving way to climb bypass as the operating conditions change from the low/intermediate temperatures and high stress regime, to the high temperature and low stress regime. … Show more
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