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- W2584893395 abstract "The effect of initial dislocation density on subsequent dislocation evolution and strain hardening in FCC aluminium alloy under laser shock peening (LSP) was investigated by using three-dimension discrete dislocation dynamics (DD) simulation. Initial dislocations were randomly generated and distributed on slip planes for three different dislocation densities of 4.21 × 1012, 8.12 × 1012 and 1.26 × 1013 m−2. Besides, variable densities of prismatic loops were introduced into the DD cells as nanoprecipitates to study the dislocation pinning effect. The flow stresses as a function of strain rate obtained by DD simulation are compared with relevant experimental data. The results show a significant dislocation density accumulation in the form of dislocation band-like structures under LSP. The overall yield strength in FCC aluminium alloy decreases with increasing initial dislocation density and forest dislocation strengthening becomes negligible under laser induced ultra-high strain rate deformation. In addition, yield strength is enhanced by increasing the nanoprecipitate density due to dislocation pinning effect." @default.
- W2584893395 created "2017-02-10" @default.
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- W2584893395 date "2017-02-02" @default.
- W2584893395 modified "2023-10-05" @default.
- W2584893395 title "Initial dislocation density effect on strain hardening in FCC aluminium alloy under laser shock peening" @default.
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- W2584893395 doi "https://doi.org/10.1080/14786435.2017.1285073" @default.
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