Computational Materials Science2022，Vol.20714.DOI:10.1016/j.commatsci.2022.111331

Prediction of the strength of aged Al-Cu alloys with non-hybrid and hybrid {100}(Al) plates

Krasnikov, V. S. Gazizov, M. R. Mayer, A. E. Bezborodova, P. A. Pogorelko, V. V. Kaibyshev, R. O.
Computational Materials Science2022，Vol.20714.DOI:10.1016/j.commatsci.2022.111331
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  • NSTL
  • Elsevier

Prediction of the strength of aged Al-Cu alloys with non-hybrid and hybrid {100}(Al) plates

Krasnikov, V. S. 1Gazizov, M. R. 2Mayer, A. E. 1Bezborodova, P. A. 1Pogorelko, V. V. 1Kaibyshev, R. O.
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作者信息

  • 1. Chelyabinsk State Univ
  • 2. Belgorod State Univ
  • 折叠

Abstract

The effect of precipitate hybridization on macroscopic strengthening in aluminum alloys is investigated on the example of Al-Cu alloy using multiscale approach combining molecular dynamics (MD), continuum modeling and discrete dislocation dynamics (DDD). Non-hybrid and hybrid {100}Al plates are considered to involve theta'-phase and theta'-phase in the core and Guinier-Preston zone (GP-like) structure along the broad interfaces, respectively. MD simulations evidence a complex dislocation-precipitate interaction mechanism involving bypassing of both hybrid and non-hybrid {100}(Al) plates by dislocations at early deformation stages and their shearing by the following dislocations. MD results are used to calibrate a continuum model of dislocation precipitate interactions in 2D DDD. The shear strength of alloy with hybrid precipitates is found to be 20% higher than that for non-hybrid plates at the same Cu content exceeding 2 wt%.

Key words

Molecular dynamics/Dislocation/Precipitate/Aluminum alloy/Scanning/transmission electron microscopy (STEM)/MECHANICAL-PROPERTIES/THETA' PRECIPITATION/MOLECULAR-DYNAMICS/ALUMINUM/PHASE/DISLOCATION/ZONES

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出版年

2022
Computational Materials Science

Computational Materials Science

EISCI
ISSN：0927-0256
被引量4
参考文献量55
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