Tension/Compression Strength Asymmetry in a Simulated Nanocrystalline Metal

Abstract

We explore asymmetries in the plastic flow of idealized nanocrystalline nickel through static molecular simulations, We find that both the yield and flow stresses of these materials are higher in compression than in tension. This result is discussed in the context of earlier work on metallic glasses, and it is suggested that very similar atomic-level mechanisms control yield in both of these materials classes.

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Document Details

Document Type
Technical Report
Publication Date
Jan 02, 2004
Accession Number
ADA426384

Entities

People

  • Alan C. Lund
  • Christopher A. Schuh

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Asymmetry
  • Boundaries
  • Compression
  • Elastic Properties
  • Grain Boundaries
  • Grain Size
  • Materials
  • Materials Science
  • Mechanical Properties
  • Modulus Of Elasticity
  • Nanocrystals
  • Physical Properties
  • Plastic Flow
  • Plastic Properties
  • Simulations
  • Stress Strain Relations
  • Stresses

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Structural Health Monitoring of Composite Structures.
  • Thin Film Deposition Science.