A Model of Microstructure Evolution in Metals Exposed to Large Strains

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10389561" target="_blank" >RIV/00216208:11320/18:10389561 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.12693/APhysPolA.134.753" target="_blank" >https://doi.org/10.12693/APhysPolA.134.753</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.12693/APhysPolA.134.753" target="_blank" >10.12693/APhysPolA.134.753</a>

Result language
angličtina
Original language name
A Model of Microstructure Evolution in Metals Exposed to Large Strains
Original language description
Crystalline materials at yield behave as anisotropic, highly viscous fluids. A microscopic inspection reveals a structural adjustment of the crystal lattice to the material flow carried by dislocations. The resistance to this flow determines the strength of ductile materials. The deformation microstructure evolves within a common framework up to very high strains > 100. To avoid energetically costly multislip, materials are subdivided into regions which deform by fewer slip systems. To maintain compatibility, the regions defined as deformation bands occur in a form of elongated alternately misoriented domains filled with fairly equiaxed dislocation cells. In the proposed continuum mechanics model, the formation of deformation bands of a lamellae type is interpreted as a spontaneous deformation instability caused by an anisotropy of hardening. However, such a model of the bands predicts their extreme orientation and their width tends to zero. This trend is opposed by hardening caused by a bowing stress of dislocations within the cells.
Czech name
—
Czech description
—

Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)