Effect of Cyclic Heat Treatment on Cast Structure of TiAl Alloy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F13%3APU110094" target="_blank" >RIV/00216305:26210/13:PU110094 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.586.222" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/KEM.586.222</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.586.222" target="_blank" >10.4028/www.scientific.net/KEM.586.222</a>

Result language

angličtina

Original language name

Effect of Cyclic Heat Treatment on Cast Structure of TiAl Alloy

Original language description

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 mm was transformed to fully lamellar structure containing gamma and alpha2 phases having the mean grain size 229 mm. Lamellae thickness of gamma was not changed while 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 mechanisms of the refining

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JL - Fatigue and fracture mechanics

OECD FORD branch

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Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2013

Confidentiality

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

Name of the periodical

Key Engineering Materials (print)

ISSN

1013-9826

e-ISSN

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Volume of the periodical

586

Issue of the periodical within the volume

9

Country of publishing house

CH - SWITZERLAND

Number of pages

4

Pages from-to

222-225

UT code for WoS article

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EID of the result in the Scopus database

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