Impact of Heat Treatment Environment of Microstructure and Transformation Path in NiTi Shape Memory Alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F11%3A00376020" target="_blank" >RIV/68081723:_____/11:00376020 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Impact of Heat Treatment Environment of Microstructure and Transformation Path in NiTi Shape Memory Alloy

Popis výsledku v původním jazyce

We report results of differential scanning calorimetry (DSC) experiments in which heat flow (T) from and to Ti-50.9at%Ni shape memory samples was recorded during the temperature scan through a B2 B19? transformation range. Prior to the DSC experiments, the samples were separately annealed in evacuated quartz capsules containing different hydrogen and helium mixtures with an overall filling pressure of 900 mbar. The quartz tubes containing the annealed samples were subsequently quenched into cold water.After quenching, the capsules were opened, martensitic transformations were investigated by DSC and the microstructure of the samples was assessed by transmission electron microscopy (TEM). Annealing in the mixtures with an increasing partial pressure ofhydrogen led to a considerable drop in the latent heat associated with the B2 B19? martensitic transformation. Results obtained using TEM suggest that hydrogen may function as a catalytic substance that accelerates the long range orderin

Název v anglickém jazyce

Impact of Heat Treatment Environment of Microstructure and Transformation Path in NiTi Shape Memory Alloy

Popis výsledku anglicky

We report results of differential scanning calorimetry (DSC) experiments in which heat flow (T) from and to Ti-50.9at%Ni shape memory samples was recorded during the temperature scan through a B2 B19? transformation range. Prior to the DSC experiments, the samples were separately annealed in evacuated quartz capsules containing different hydrogen and helium mixtures with an overall filling pressure of 900 mbar. The quartz tubes containing the annealed samples were subsequently quenched into cold water.After quenching, the capsules were opened, martensitic transformations were investigated by DSC and the microstructure of the samples was assessed by transmission electron microscopy (TEM). Annealing in the mixtures with an increasing partial pressure ofhydrogen led to a considerable drop in the latent heat associated with the B2 B19? martensitic transformation. Results obtained using TEM suggest that hydrogen may function as a catalytic substance that accelerates the long range orderin

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/GA106%2F09%2F1913" target="_blank" >GA106/09/1913: Martenzitické transformace ve slitinách NiTi</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název statě ve sborníku

METAL 2011 Conference Proceedings

ISBN

978-80-87294-22-2

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

"paper no. 1031"

Název nakladatele

TANGER, spol. s r.o.

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

18. 5. 2011

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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