MD simulation of nanoindentation on (001) and (111) surfaces of Ag-Ni multilayers

Yinbo Zhao, Xianghe Peng, Tao Fu, Rong Sun, Chao Feng, Zhongchang Wang

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Abstract We perform MD simulations of the nanoindentation on (001) and (111) surfaces of Ag-Ni multilayers with different modulation periods, and find that both the hardness and maximum force increase with the increase of modulation period, in agreement with the inverse Hall-Petch relation. A prismatic partial dislocation loop is observed in the Ni(111)/Ag(111) sample when the modulation period is relatively large. We also find that misfit dislocation network shows a square shape for the Ni(111)/Ag(111) interface, while a triangle shape for the Ni(001)/Ag(001) interface. The pyramidal defect zones are also observed in Ni(001)/Ag(001) sample, while the intersecting stacking faults are observed in Ni(111)/Ag(111) sample after dislocation traversing interface. The results offer insights into the nanoindentation behaviors in metallic multilayers, which should be important for clarifying strengthening mechanism in many other multilayers.

Original languageEnglish
Article numberPHYSED1500575
Pages (from-to)481-488
Number of pages8
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume74
DOIs
Publication statusPublished - 2015 Aug 10

Keywords

  • Ag-Ni multilayers
  • Inverse Hall-Petch relationship
  • MD simulation
  • Modulation period
  • Nanoindentation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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