Multiscale Computational Design Optimization of Copper-Strengthened Steel for High Cycle Fatigue

Abstract

This research project performed FTMP-based modeling of surface groove formations that ultimately evolve into a crack and the effects of dislocation substructures were considered. Cu-added steels were studied as a model system. As definitive steps toward it, roughly three sub-divided subjects are dealt with: They are (1) effects of Cu addition on the core structure of a screw dislocation in Fe, approached through ab initio-based calculations, (2) Field-theoretical evaluations of dislocation cell structures in terms of flow-evolutionary law (i.e., fluctuations in incompatibility tensor field versus elastic strain energy) and (3) modeling of a slip band (of PSB ladder underlying structure) and attendant crack initiation process.

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Document Details

Document Type
Technical Report
Publication Date
Mar 19, 2010
Accession Number
ADA516003

Entities

People

  • Nasr M. Ghoniem
  • Tadashi Hasebe

Organizations

  • Kobe University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Cell Structure
  • Cells
  • Diffusion
  • Dislocations
  • Engineering
  • Information Operations
  • Mechanical Engineering
  • Multiscale Modeling
  • Optimization
  • Planar Structures
  • Plastic Deformation
  • Simulations
  • Single Crystals
  • Surface Roughness
  • Test And Evaluation

Readers

  • Computational Fluid Dynamics (CFD)
  • Materials Science and Engineering.