On the nature of ? phase cutting and its effect on high temperature and low stress creep anisotropy of Ni-base single crystal superalloys

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F14%3A00435446" target="_blank" >RIV/68081723:_____/14:00435446 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.actamat.2014.01.021" target="_blank" >http://dx.doi.org/10.1016/j.actamat.2014.01.021</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2014.01.021" target="_blank" >10.1016/j.actamat.2014.01.021</a>

Result language

angličtina

Original language name

On the nature of ? phase cutting and its effect on high temperature and low stress creep anisotropy of Ni-base single crystal superalloys

Original language description

The creep anisotropy of the single crystal superalloy LEK 94 deformed in tension along [001] and [110] directions at 1293 K and 160 MPa was investigated. Elementary microstructural processes which are responsible for a higher increase in creep rates withstrain during [110] as compared to [001] tensile loading were identified. [110] tensile creep is associated with a higher number of gamma' phase cutting events, where two dislocations with equal Burgers vectors of type (110) jointly shear the gamma' phase. The resulting (220)-type superdislocation can move by glide. In contrast, during [001] tensile loading, two dislocations with different (110)-type Burgers vectors must combine for gamma' phase cutting. The resulting (200)-type superdislocations can only move by a combination of glide and climb. The evolution of dislocation networks during creep determines the nature of the gamma' phase cutting events. The higher [110] creep rates at strains exceeding 2% result from a combination of a

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

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

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

Name of the periodical

Acta Materialia

ISSN

1359-6454

e-ISSN

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Volume of the periodical

69

Issue of the periodical within the volume

MAY

Country of publishing house

GB - UNITED KINGDOM

Number of pages

19

Pages from-to

246-264

UT code for WoS article

000335110000024

EID of the result in the Scopus database

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