Structural changes of single crystals of low-alloyed tungsten alloys at thermal cycling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F12%3A86084259" target="_blank" >RIV/61989100:27360/12:86084259 - isvavai.cz</a>

Výsledek na webu

<a href="http://80.www.sciencedirect.com.dialog.cvut.cz/science/article/pii/S0263436812000224" target="_blank" >http://80.www.sciencedirect.com.dialog.cvut.cz/science/article/pii/S0263436812000224</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijrmhm.2012.02.001" target="_blank" >10.1016/j.ijrmhm.2012.02.001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structural changes of single crystals of low-alloyed tungsten alloys at thermal cycling

Popis výsledku v původním jazyce

Parameters of sub-structure of single crystals of low-alloyed tungsten alloys from the system W-Nb and W-Mo were investigated after thermal cycling in argon protective atmosphere. The mode of thermal cycling of tungsten based single crystals consisted ofheating to the temperature of 2500 degrees C and of cooling to the temperature of 500 degrees C with dwell of 3.5 s at those temperature. It was established with use of X-ray topography, OLM and SEM, that after 100 thermocycles dislocations were re-distributed, sub-boundaries of the 2nd order were "washed away" (disappeared), and the size of sub-grains of the 1st order and their angle disorientations increased - as a result of heat stresses. After 500 thermocycles formation of new boundaries was observed in the structure as a result of polygonisation, i.e. by ordering of dislocations of the same sign. Application of 2000 thermocycles led to an increase of size of new grains and that of their angle disorientations. All the tested sample

Název v anglickém jazyce

Structural changes of single crystals of low-alloyed tungsten alloys at thermal cycling

Popis výsledku anglicky

Parameters of sub-structure of single crystals of low-alloyed tungsten alloys from the system W-Nb and W-Mo were investigated after thermal cycling in argon protective atmosphere. The mode of thermal cycling of tungsten based single crystals consisted ofheating to the temperature of 2500 degrees C and of cooling to the temperature of 500 degrees C with dwell of 3.5 s at those temperature. It was established with use of X-ray topography, OLM and SEM, that after 100 thermocycles dislocations were re-distributed, sub-boundaries of the 2nd order were "washed away" (disappeared), and the size of sub-grains of the 1st order and their angle disorientations increased - as a result of heat stresses. After 500 thermocycles formation of new boundaries was observed in the structure as a result of polygonisation, i.e. by ordering of dislocations of the same sign. Application of 2000 thermocycles led to an increase of size of new grains and that of their angle disorientations. All the tested sample

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

International Journal of Refractory Metals and Hard Materials

ISSN

0263-4368

e-ISSN

—

Svazek periodika

32

Číslo periodika v rámci svazku

neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

5

Strana od-do

61-65

Kód UT WoS článku

000302841400011

EID výsledku v databázi Scopus

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