Molecular Dynamics Simulation Study of Uniaxial Ratcheting Behaviors for Ultrafine-Grained Nanocrystalline Nickel

Pal, Snehanshu; Gururaj, K.; Meraj, Md.; Bharadwaj, Ravindra Giriraj

doi:10.1007/s11665-019-04256-z

Cited by 12 publications

(1 citation statement)

References 55 publications

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“…Reduction in grain size of polycrystalline metal into nano scale more precisely less than 100 nm has positive influence on mechanical properties like strength [1] and hardness [2] and thereby nanocrystalline (NC) metals have attracted a great deal of attention [3][4][5][6][7]. However, low ductility (~5-8%) remains to be a drawback of such materials; therefore these materials are not able to gain deserved importance as structural materials [8,9].…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics simulation based investigation of possible enhancement in strength and ductility of nanocrystalline aluminum by CNT reinforcement

Pal

Babu

Gargeya

et al. 2020

Materials Chemistry and Physics

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Molecular dynamics (MD) based study of nanocrystalline (NC) Al and CNT (carbon nanotube) reinforced NC Al specimens having grain sizes ~9 nm have been carried out under tensile loading using hybrid potentials for different temperatures (10 K, 300 K and 681 K) at a particular strain rate of 10 10 s-1. Structural variation and defect evolution during the deformation have been investigated. An enhancement in both strength and ductility is observed in case of the CNT embedded NC Al specimens with respect to NC Al specimen and such improvement is significant in case of (30,30) CNT embedded NC Al specimen. It is also found that NC Al matrix is fractured first, then the CNT at lower test temperature, whereas at high temperature, the CNT fractures before the matrix.

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