Plastic deformation of magnetically isotropic Cr single crystals compressed at 77 K

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F21%3A00540492" target="_blank" >RIV/68081723:_____/21:00540492 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/21:PU146327

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0749641921000139?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0749641921000139?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijplas.2021.102938" target="_blank" >10.1016/j.ijplas.2021.102938</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Plastic deformation of magnetically isotropic Cr single crystals compressed at 77 K

Popis výsledku v původním jazyce

A series of compression tests at 77 K was carried out on chromium single crystals in magneticallynisotropic state to investigate the slip activity during the first 2–4% of plastic strain. Macroscopicnsamples of 3 mm thickness were polished mechanically and electrolytically and their orientationsndetermined before and after deformation by electron backscatter diffraction to assess the magnitudes and directions of crystal rotations. The crystals compressed in the direction close to [001]ndeformed primarily by slip on the most highly stressed (101)[111] and (101)[111] systems.nLoading the crystals in the directions close to the [011] − [111] edge of the stereographic trianglenresulted in preferential twinning on {112}〈111〉 systems. For loading in the center-triangle region, diffraction contrast imaging in TEM reveals the presence of [100] screw junctions betweennintersecting 1/2[111] and 1/2 [111] screw dislocations. Using molecular statics simulations, wenshow that this junction does not break under the applied stress and moves together with the twondislocations on their common (011) plane. In contrast to the prediction of the Schmid law, the slipnmorphology for center-triangle orientations is thus dominated by anomalous slip on the lowstressed (011) plane.

Název v anglickém jazyce

Plastic deformation of magnetically isotropic Cr single crystals compressed at 77 K

Popis výsledku anglicky

A series of compression tests at 77 K was carried out on chromium single crystals in magneticallynisotropic state to investigate the slip activity during the first 2–4% of plastic strain. Macroscopicnsamples of 3 mm thickness were polished mechanically and electrolytically and their orientationsndetermined before and after deformation by electron backscatter diffraction to assess the magnitudes and directions of crystal rotations. The crystals compressed in the direction close to [001]ndeformed primarily by slip on the most highly stressed (101)[111] and (101)[111] systems.nLoading the crystals in the directions close to the [011] − [111] edge of the stereographic trianglenresulted in preferential twinning on {112}〈111〉 systems. For loading in the center-triangle region, diffraction contrast imaging in TEM reveals the presence of [100] screw junctions betweennintersecting 1/2[111] and 1/2 [111] screw dislocations. Using molecular statics simulations, wenshow that this junction does not break under the applied stress and moves together with the twondislocations on their common (011) plane. In contrast to the prediction of the Schmid law, the slipnmorphology for center-triangle orientations is thus dominated by anomalous slip on the lowstressed (011) plane.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

International Journal of Plasticity

ISSN

0749-6419

e-ISSN

1879-2154

Svazek periodika

138

Číslo periodika v rámci svazku

MARCH

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

19

Strana od-do

102938

Kód UT WoS článku

000623869800004

EID výsledku v databázi Scopus

2-s2.0-85101328476