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Independence of work hardening and precipitation strengthening in a nanocluster strengthened steel
Ist Teil von
Journal of alloys and compounds, 2017-07, Vol.712 (C), p.573-578
Ort / Verlag
Lausanne: Elsevier B.V
Erscheinungsjahr
2017
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Work hardening and precipitation strengthening are two important strengthening methods that closely associate with dislocation density. Here, a new class of nanocluster strengthened steel with a tensile strength of ∼2.02 GPa and an elongation of ∼7% is developed through a combination of work hardening and precipitation strengthening. The work hardening is strongly dependent on the dislocation density induced by thermomechanical treatments while there is no effect for dislocation density on precipitation strengthening. The work hardening and precipitation strengthening are independent and can be controlled separately. The strengthening effects of nanoscale precipitates are quantitatively analyzed and assessed.
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•A nanocluster strengthened steel with ultra-high strength have been developed.•The nanoclusters are not preferentially precipitating onto the dislocations.•Precipitation strengthening is not dependent on the dislocation density.•Work hardening and precipitation strengthening are independent.