Effect of surface activation and internal mechanical stress on the diffusion of oxygen atoms in TiNi alloys in electron beam treatment

A. G. Knyazeva, A. V. Tyan

Research output: Contribution to journalArticle

Abstract

The paper studies the nonlinear effect of nonequilibrium surface activation and internal mechanical stress on the diffusion of oxygen atoms from an adsorbed surface layer of TiNi alloys deep into the materials in electron beam treatment. The mathematical model proposed in the paper includes heat, diffusion and kinetic equations with initial and boundary conditions appropriate to pulsed electron beam treatment. The kinetic parameters are estimated, and the spatial and temporal distributions of temperature, concentration and stress are calculated for a wide range of parameters. The heat penetration and diffusion depths are determined; the results obtained with and without regard for activation are compared.

Original languageEnglish
Pages (from-to)94-103
Number of pages10
JournalPhysical Mesomechanics
Volume14
Issue number1-2
DOIs
Publication statusPublished - 2011

Fingerprint

Electron beams
oxygen atoms
Chemical activation
activation
electron beams
Oxygen
Atoms
temporal distribution
Kinetic parameters
kinetic equations
mathematical models
surface layers
spatial distribution
penetration
Boundary conditions
Mathematical models
boundary conditions
heat
thermodynamics
Kinetics

Keywords

  • Diffusion
  • Dimensionless variables
  • Electron beam treatment
  • Mechanical stress and strain
  • Nonequilibrium activation
  • Numerical simulation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Mechanics of Materials
  • Materials Science(all)

Cite this

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abstract = "The paper studies the nonlinear effect of nonequilibrium surface activation and internal mechanical stress on the diffusion of oxygen atoms from an adsorbed surface layer of TiNi alloys deep into the materials in electron beam treatment. The mathematical model proposed in the paper includes heat, diffusion and kinetic equations with initial and boundary conditions appropriate to pulsed electron beam treatment. The kinetic parameters are estimated, and the spatial and temporal distributions of temperature, concentration and stress are calculated for a wide range of parameters. The heat penetration and diffusion depths are determined; the results obtained with and without regard for activation are compared.",
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AU - Knyazeva, A. G.

AU - Tyan, A. V.

PY - 2011

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N2 - The paper studies the nonlinear effect of nonequilibrium surface activation and internal mechanical stress on the diffusion of oxygen atoms from an adsorbed surface layer of TiNi alloys deep into the materials in electron beam treatment. The mathematical model proposed in the paper includes heat, diffusion and kinetic equations with initial and boundary conditions appropriate to pulsed electron beam treatment. The kinetic parameters are estimated, and the spatial and temporal distributions of temperature, concentration and stress are calculated for a wide range of parameters. The heat penetration and diffusion depths are determined; the results obtained with and without regard for activation are compared.

AB - The paper studies the nonlinear effect of nonequilibrium surface activation and internal mechanical stress on the diffusion of oxygen atoms from an adsorbed surface layer of TiNi alloys deep into the materials in electron beam treatment. The mathematical model proposed in the paper includes heat, diffusion and kinetic equations with initial and boundary conditions appropriate to pulsed electron beam treatment. The kinetic parameters are estimated, and the spatial and temporal distributions of temperature, concentration and stress are calculated for a wide range of parameters. The heat penetration and diffusion depths are determined; the results obtained with and without regard for activation are compared.

KW - Diffusion

KW - Dimensionless variables

KW - Electron beam treatment

KW - Mechanical stress and strain

KW - Nonequilibrium activation

KW - Numerical simulation

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