Dislocation Slip and Deformation Twinning Interplay during High Temperature Deformation in .gamma.-TiAl Base Intermetallics.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F01%3A07013156" target="_blank" >RIV/68081723:_____/01:07013156 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Dislocation Slip and Deformation Twinning Interplay during High Temperature Deformation in .gamma.-TiAl Base Intermetallics.

Original language description

Interrupted compression creep tests were performed at 973 K and 350 MPa to study strain dependent microstructural changes in near-.gamma. equiaxed Ti-48A1-2Cr-2Nb-B alloy. Dislocation densities and volume fraction of deformation twins were measured in the range of strain where sharp creep rate minima occur. The steep decrease of creep rate during initial 1% of strain is associated with a considerable increase in density of ordinary dislocations and superdislocations. Twinning processes are rather limited during this primary stage. On the other hand, in the strain range of minimum creep rate the volume fraction of deformation twins grows due to the increasing number of twinned grains and decreasing spacing between individual twins. Based on these results it is suggested that, in the pure- and near-.gamma. TiAl equiaxed grain microstructures, the increase of creep rate after minimum and its new gradual saturation reflects a contribution of deformation twins to the creep strain accumulati

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

JG - Metallurgy, metal materials

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2001

Confidentiality

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

Name of the periodical

Materials Science and Engineering. A

ISSN

0921-5093

e-ISSN

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Volume of the periodical

319-321

Issue of the periodical within the volume

N/A

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

7

Pages from-to

820-826

UT code for WoS article

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EID of the result in the Scopus database

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