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531 (0,077s) •

Project

Internal stress in metallic materials (IAA2112901)

are interested in the motion of dislocations as well as in the evolution in the dislocationsubstructure,the multiplication rate of dislocations, and the mobile dislocation density. On the other hand, the creating ...

JG - Hutnictví, kovové materiály

  • 1999 - 2001
    • •
  • 8 300 tis. Kč
    • •
  • 1 516 tis. Kč
    • •
  • AV ČR
Project

Calculation of the Peierls barrier in bcc metals and its dependence on stress (GAP204/10/0255)

Plastic deformation of bcc metals is governed by motion of 1/2 screw dislocations that possess a high lattice fiction (Peierls) stress. At finite temperatures and strain rates, the dislocation moves by overcoming the Peierl...

BM - Fyzika pevných látek a magnetismus

  • 2010 - 2012
    • •
  • 1 292 tis. Kč
    • •
  • 1 292 tis. Kč
    • •
  • GA ČR
Project

Development of constitutive equations for creep in nickel base superalloy single crystals (IAA2041608)

is possible only if the dislocation structure is continuously recovered. At low applied stresses the nonconservative motion of dislocations along gama/gama` interfaces enables% of the "soft" gama phase in channels between ...

JG - Hutnictví, kovové materiály

  • 1996 - 1998
    • •
  • 1 176 tis. Kč
    • •
  • 698 tis. Kč
    • •
  • AV ČR
Project

Multiscale investigation of the intermittence of plastic deformation using acoustic emission. (MEB021004)

The goal of the project is to investigate the intrinsic intermittent character of plastic flow of crystalline solids, which reflects self-organization of dislocations and other crystal defects. As proven recently, a scale-free, correlated av...

BI - Akustika a kmity

  • 2010 - 2011
    • •
  • 121 tis. Kč
    • •
  • 121 tis. Kč
    • •
  • MŠMT
Project

Multiscale investigation of plastic deformation processes in materials by the acoustic emission technique (GAP108/11/1267)

The project is aimed at the intrinsic intermittent character ofplastic flow of crystalline solids, which reflects self-organization ofdislocations and other defects. A scale-free, correlated motion of dislocation avalanches manifest...

JG - Hutnictví, kovové materiály

  • 2011 - 2014
    • •
  • 3 800 tis. Kč
    • •
  • 3 800 tis. Kč
    • •
  • GA ČR
Project

Alternative methods of the activation analysis in creep (IAA2041202)

In an analysis of high temperature deformation, two approaches based on a simple characterization of microstructure are applied, namely the internal stress approach and the obstacle strength approach. Both approaches meet problems in explaining the t...

JG - Hutnictví, kovové materiály

  • 2002 - 2004
    • •
  • 1 775 tis. Kč
    • •
  • 821 tis. Kč
    • •
  • AV ČR
Project

Acoustic and electromagnetic emission in materials research (GA103/06/0708)

and the dislocation displacement. Inter-atomic bonds are disturbed and energy is released motion. Moreover, in consequence of the chemical band disturbance, electric charges the charge carrier motion of on the crack faces....

JJ - Ostatní materiály

  • 2006 - 2008
    • •
  • 1 797 tis. Kč
    • •
  • 1 797 tis. Kč
    • •
  • GA ČR
Project

The model of dislocation structure formation based on the theory of continuous distribution of dislocations (GA106/00/1109)

theoretical model of the dislocation structure formation and their transformations of dislocations. Twaveraged interacting dislocation populations are considered. The glide dislocations are described by the di...

JG - Hutnictví, kovové materiály

  • 2000 - 2002
    • •
  • 1 509 tis. Kč
    • •
  • 885 tis. Kč
    • •
  • GA ČR
Project

Non-Schmid behavior of dislocations in magnesium and its alloys (8J19UA037)

The aim of proposed project is the computer simulation study of dissociated dislocations in magnesium. It is supposed that processes in dislocation core can lead to inclinations from the Schmid law for dislocation glide, si...

Materials engineering

  • 2019 - 2021
    • •
  • 130 tis. Kč
    • •
  • 126 tis. Kč
    • •
  • MŠMT
Project

The continuum mechanics approach to the problem of geometrically necessary dislocation boundaries (GA106/03/0826)

At medium and large plastic strains dislocations commonly organize themselves into a mosaic pattern of thin boundaries that surround regions almost dislocations free, Due to differing slip activity the regions on either side of a

BM - Fyzika pevných látek a magnetismus

  • 2003 - 2005
    • •
  • 1 310 tis. Kč
    • •
  • 980 tis. Kč
    • •
  • GA ČR
  • 1 - 10 out of 531