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Modelling the plastic deformation of iron

: Chen, Z.

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Karlsruhe: KIT Scientific Publishing, 2013, XII, 146 pp.
Zugl.: Karlsruhe, Inst. für Technologie (KIT), Diss., 2012
Schriftenreihe des Instituts für Angewandte Materialien, 15
ISBN: 978-3-86644-968-8
URN: urn:nbn:de:0072-322163
Dissertation, Electronic Publication
Fraunhofer IWM ()

The 1/2<111> screw dislocations in bcc iron are studied by atomistic simulations. An analytical yield criterion captures correctly the non-Schmid plastic behavior. A model Peierls potential develops a link between the atomistic modeling at 0 K and the thermally activated dislocation motion. All predicted features agree well with experimental observations. This work establishes a consistent bottom-up model that provides an insight into the microscopic origins of the plastic behavior of bcc iron.