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September 8, 2008Modelling and Simulation in Materials Science and EngineeringOpen Access

Effect of normal loading on grain boundary migration and sliding in copper

D.H. Warner Jean‐François Molinari

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Abstract

Molecular dynamics simulations of bicrystals are used to probe the influence of normal loading on grain boundary (GB) shear response. A Σ11(113) Cu GB is chosen to investigate GB migration, while Σ9(221) and Σ27(552) GBs are used to explore GB sliding. The shear strengths of the Σ11(113) and Σ9(221) GBs are found to be largely independent of the normal stresses acting on the GBs. However, the shear strength of the Σ27(552) GB was found to be nonmonotonically correlated with normal stress. The effect of intersecting partial dislocations at the GB is discussed for both GB sliding and migration.

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Warner et al. (2008) studied this question.

synapsesocial.com/papers/6a74418f6b20bd397ca7f94a https://doi.org/10.1088/0965-0393/16/7/075007

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