Creep behaviour and superplasticity in UFG Ti-6Al-4V alloy

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Creep behaviour and superplasticity in UFG Ti-6Al-4V alloy

Popis výsledku v původním jazyce

In this paper, the creep behaviour of a Ti-6Al-4V alloy processed by multiaxial forging was investigated. The originally as-received coarse ?grained titanium alloy was processed by multiaxial forging in the temperature range from 973 to 748 K. The initial strain rate was 10-3 s-1 strain per deformation step was about 0.5. Ultrafine-grained Ti alloy with mean grain size d150 nm was tested at 648-873 K at constant stress in compression and under constant load in tension. The values of the stress exponentof the minimum creep rate n and creep activation energy Qc were determined. The microstructure of specimens after creep testing was examined by FIB/SEM Tescan Lyra 3 equipped with NordlysNano EBSD detector operating at an accelerating voltage of 20 kV with specimen tilted at 70°. The EBSD analyses of both gauge length and head of specimens were performed in the longitudinal sections parallel to the stress direction. The results of the uniaxial creep tests showed different values of the s

Název v anglickém jazyce

Creep behaviour and superplasticity in UFG Ti-6Al-4V alloy

Popis výsledku anglicky

In this paper, the creep behaviour of a Ti-6Al-4V alloy processed by multiaxial forging was investigated. The originally as-received coarse ?grained titanium alloy was processed by multiaxial forging in the temperature range from 973 to 748 K. The initial strain rate was 10-3 s-1 strain per deformation step was about 0.5. Ultrafine-grained Ti alloy with mean grain size d150 nm was tested at 648-873 K at constant stress in compression and under constant load in tension. The values of the stress exponentof the minimum creep rate n and creep activation energy Qc were determined. The microstructure of specimens after creep testing was examined by FIB/SEM Tescan Lyra 3 equipped with NordlysNano EBSD detector operating at an accelerating voltage of 20 kV with specimen tilted at 70°. The EBSD analyses of both gauge length and head of specimens were performed in the longitudinal sections parallel to the stress direction. The results of the uniaxial creep tests showed different values of the s

Druh

O - Ostatní výsledky

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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