EFFECT OF CYCLIC HEAT TREATMENT ON CAST STRUCTURE OF TIAL ALLOY

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60162694%3AG43__%2F13%3A00499364" target="_blank" >RIV/60162694:G43__/13:00499364 - 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

EFFECT OF CYCLIC HEAT TREATMENT ON CAST STRUCTURE OF TIAL ALLOY

Popis výsledku v původním jazyce

The subject of the article is focused on the refining of the cast structure of gamma TiAl?2Nb alloy using cyclic heat treatment and on the analysis of the grain refining mechanism. Microstructure evolution after applied cycles of heat treatment was characterized using light, laser and electron microscopy and using microhardness tests. Application of five heat treatment cycles during which two phase transformations (eutectoid and alpha-recrystallization reactions) repeatedly took place resulted in refining of the cast columnar structure. The mean grain-lamellar colony size 512 micrometres was transformed to fully lamellar structure containing gamma and alpha2 phases having the mean grain size 229 micrometres. Lamellae thickness of gamma was not changedwhile the thickness of alpha2 phase decreased to 78 nm. Refining of alpha2 phase resulted in the increase of the microhardness by 20 %. The recrystallized cast structure obtained by cyclic heat treatment and the knowledge on the mechanism

Název v anglickém jazyce

EFFECT OF CYCLIC HEAT TREATMENT ON CAST STRUCTURE OF TIAL ALLOY

Popis výsledku anglicky

The subject of the article is focused on the refining of the cast structure of gamma TiAl?2Nb alloy using cyclic heat treatment and on the analysis of the grain refining mechanism. Microstructure evolution after applied cycles of heat treatment was characterized using light, laser and electron microscopy and using microhardness tests. Application of five heat treatment cycles during which two phase transformations (eutectoid and alpha-recrystallization reactions) repeatedly took place resulted in refining of the cast columnar structure. The mean grain-lamellar colony size 512 micrometres was transformed to fully lamellar structure containing gamma and alpha2 phases having the mean grain size 229 micrometres. Lamellae thickness of gamma was not changedwhile the thickness of alpha2 phase decreased to 78 nm. Refining of alpha2 phase resulted in the increase of the microhardness by 20 %. The recrystallized cast structure obtained by cyclic heat treatment and the knowledge on the mechanism

Druh

D - Stať ve sborníku

CEP obor

KA - Vojenství

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název statě ve sborníku

ICMT´13 INTERNATIONAL CONFERENCE ON MILITARY TECHNOLOGIES 2013

ISBN

978-80-7231-918-3

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

1521-1524

Název nakladatele

Univerzita obrany, Brno

Místo vydání

Brno, Czech Republic

Místo konání akce

Brno

Datum konání akce

22. 5. 2013

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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