About: Dip-Test Internal Stress and the Composite Model of Creep Deformation     Goto   Sponge   NotDistinct   Permalink

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  • The composite model of plastic deformation is regarded as a realistic approximation of creep behaviour at elevated temperatures in a well-developed substructure consisting of dislocationdense subgrain boundaries (hard regions) and subgrain interiors (soft regions) with relatively low dislocation density. In the present contribution, the model is applied for an estimation of internal stresses that are experimentally measured by the dip-test technique. Two situations are considered within the model: (i) the density of moving dislocations is the same in both hard and soft regions and (ii) the density of moving dislocations is proportional to the local density in the respective region. The model enables to express the internal stress in terms of microstructural variables found by independent microscopic observations. It is shown that the magnitude of volume fraction of hard and soft region in the composite model has only a small effect on the value of internal stress.
  • The composite model of plastic deformation is regarded as a realistic approximation of creep behaviour at elevated temperatures in a well-developed substructure consisting of dislocationdense subgrain boundaries (hard regions) and subgrain interiors (soft regions) with relatively low dislocation density. In the present contribution, the model is applied for an estimation of internal stresses that are experimentally measured by the dip-test technique. Two situations are considered within the model: (i) the density of moving dislocations is the same in both hard and soft regions and (ii) the density of moving dislocations is proportional to the local density in the respective region. The model enables to express the internal stress in terms of microstructural variables found by independent microscopic observations. It is shown that the magnitude of volume fraction of hard and soft region in the composite model has only a small effect on the value of internal stress. (en)
  • Kompozitní model plastické deformace je považován za realistické přiblížení popisu vysokoteplotního creepového chování v materiálech s dobře vyvinutou substrukturou sestávající z hranic podzrn (tvrdé zóny) a vnitřků podzrn (měkké zóny) s relativně nízkou hustotou dislokací. V příspěvku je tento model použit pro odhad vnitřních napětí, která jsou experimentálně měřena technikou změn napětí. Jsou uvažovány dvě situace: (1) hustota pohybujících se dislokací je stejná ve tvrdých i v měkkých zónách a (2) hustota pohybujících se dislokací je úměrná lokální hustotě v příslušné zóně. Model umožňuje vyjádřit vnitřní napětí pomocí mikrostrukturních proměnných stanovených nezávislým pozorováním. Je ukázáno, že velikost objemového podílu tvrdých a měkkých zón má jenom malý vliv na hodnotu vnitřního napětí. (cs)
Title
  • Dip-Test Internal Stress and the Composite Model of Creep Deformation
  • Dip-Test Internal Stress and the Composite Model of Creep Deformation (en)
  • Vnitřní napětí a kompozitní model creepové deformace (cs)
skos:prefLabel
  • Dip-Test Internal Stress and the Composite Model of Creep Deformation
  • Dip-Test Internal Stress and the Composite Model of Creep Deformation (en)
  • Vnitřní napětí a kompozitní model creepové deformace (cs)
skos:notation
  • RIV/68081723:_____/05:00024799!RIV06-AV0-68081723
http://linked.open.../vavai/riv/strany
  • 291;294
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(IAA2041202), Z(AV0Z20410507)
http://linked.open...iv/cisloPeriodika
  • -
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 518198
http://linked.open...ai/riv/idVysledku
  • RIV/68081723:_____/05:00024799
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • creep; internal stress; subgrain (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • CH - Švýcarská konfederace
http://linked.open...ontrolniKodProRIV
  • [A9F98853AA3E]
http://linked.open...i/riv/nazevZdroje
  • Materials Science Forum
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 482
http://linked.open...iv/tvurceVysledku
  • Dobeš, Ferdinand
  • Orlová, Alena
http://linked.open...n/vavai/riv/zamer
issn
  • 0255-5476
number of pages
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