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Condensed Matter > Materials Science

arXiv:1907.12053 (cond-mat)
[Submitted on 28 Jul 2019]

Title:Strengthening of Al-Cu alloys by Guinier-Preston zones: predictions from atomistic simulations

Authors:G. Esteban-Manzanares, B. Bellón, E. Martínez, I. Papadimitriou, J. LLorca
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Abstract:A scale bridging strategy based in molecular statics and molecular dynamics simulations in combination with transition state theory has been developed to determine the flow stress of Al-Cu alloy containing Guinier-Preston zones. The athermal contribution to the flow stress was determined from the Taylor model, while the thermal contribution was obtained from the obstacle strength and the free energy barrier. These two magnitudes were obtained by means of molecular statics and molecular dynamics simulations of the interaction of edge dislocations with Guinier-Preston zones in two different orientations. The predictions of the model were compared with experimental data and were in reasonable agreement, showing the potential of atomistic simulations in combination with transition state theory to predict the flow stress of metallic alloys strengthened with precipitates.
Subjects: Materials Science (cond-mat.mtrl-sci)
Cite as: arXiv:1907.12053 [cond-mat.mtrl-sci]
  (or arXiv:1907.12053v1 [cond-mat.mtrl-sci] for this version)
  https://doi.org/10.48550/arXiv.1907.12053
Journal reference: Journal of the Mechanics and Physics of Solids, 132, 103675, 2019
Related DOI: https://doi.org/10.1016/j.jmps.2019.07.018

Submission history

From: Javier Llorca [view email]
[v1] Sun, 28 Jul 2019 09:20:00 UTC (4,104 KB)
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