Deformation twinning in vanadium single crystals tested in compression at 77 K

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F18%3A00495454" target="_blank" >RIV/68081723:_____/18:00495454 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0921509318312279?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0921509318312279?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.msea.2018.09.030" target="_blank" >10.1016/j.msea.2018.09.030</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Deformation twinning in vanadium single crystals tested in compression at 77 K

Popis výsledku v původním jazyce

Vanadium is the least studied non-magnetic body centered cubic metal whose mechanism of plastic deformation is still a subject of controversy. Depending on the level of purity and spatial distribution of interstitial impurities, it has been shown to deform by anomalous slip on the low-stressed (01̅1) plane or by twinning along {112} planes in the 〈111〉 direction. In order to resolve this controversy, we test high-purity vanadium single crystals of four orientations at 77 K under a low strain rate to 1–2% of the plastic strain. All our samples contain spatially homogeneous distribution of impurities and deform predominantly by twinning on two {112}⟨111⟩ systems in which the {112} planes are sheared in the twinning sense. The secondary surface markings correspond to slip on {110}⟨111⟩ systems with the highest Schmid factors, whereas weak (01̅1) slip is found mostly in the vicinity of twins. These results support the argument made previously by Thompson and Carlson (1965) that a spatially homogenenous distribution of interstitial impurities in high purity vanadium single crystals leads to predominant twinning.

Název v anglickém jazyce

Deformation twinning in vanadium single crystals tested in compression at 77 K

Popis výsledku anglicky

Vanadium is the least studied non-magnetic body centered cubic metal whose mechanism of plastic deformation is still a subject of controversy. Depending on the level of purity and spatial distribution of interstitial impurities, it has been shown to deform by anomalous slip on the low-stressed (01̅1) plane or by twinning along {112} planes in the 〈111〉 direction. In order to resolve this controversy, we test high-purity vanadium single crystals of four orientations at 77 K under a low strain rate to 1–2% of the plastic strain. All our samples contain spatially homogeneous distribution of impurities and deform predominantly by twinning on two {112}⟨111⟩ systems in which the {112} planes are sheared in the twinning sense. The secondary surface markings correspond to slip on {110}⟨111⟩ systems with the highest Schmid factors, whereas weak (01̅1) slip is found mostly in the vicinity of twins. These results support the argument made previously by Thompson and Carlson (1965) that a spatially homogenenous distribution of interstitial impurities in high purity vanadium single crystals leads to predominant twinning.

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

2018

Kód důvěrnosti údajů

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

Název periodika

Materials Science and Engineering A Structural Materials Properties Microstructure and Processing

ISSN

0921-5093

e-ISSN

1873-4936

Svazek periodika

737

Číslo periodika v rámci svazku

NOV

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

9

Strana od-do

413-421

Kód UT WoS článku

000448493600046

EID výsledku v databázi Scopus

2-s2.0-85054305798