About the determination of the thermal and athermal stress
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F08%3A00097642" target="_blank" >RIV/68081723:_____/08:00097642 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
About the determination of the thermal and athermal stress
Original language description
The determination of the thermal and athermal stress components using relaxation experiments along a stress?strain curve is critically evaluated. Short-term stress-relaxations are performed along the stress?strain curve of single crystals of Ge at 850K,Cu, and Ni3Al at 300K. They are analyzed by three different equations with two or three parameters including the athermal stress. The stress components obtained are compared to the values determined by stress-reduction experiments considered as the reference method. The relaxation rate is considered successively to be a power function or a hyperbolic sine function of the effective stress or a hyperbolic decrease of stress with time is assumed. It is shown that the three methods overestimate or underestimate the stress components depending on the material and deformation conditions. The error can be as large as about 100%. Reasons for the inadequacy of short-term relaxation experiments for the determination of the stress components are d
Czech name
O určování tepelně aktivované složky napětí
Czech description
Tepelně aktivovaná složka napětí byla změřena pro 3 modelové materiály (Cu, Ge, Ni3Al) pomocí dvou nezávislých metod: relaxace napětí a dip testu. Bylo zjištěno, že výsledky obou metod se mohou podstatně lišit, což je vysvětleno nevhodností relaxace napětí k měření tepelně aktivvované složky napětí.
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Acta Materialia
ISSN
1359-6454
e-ISSN
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Volume of the periodical
56
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
333-340
UT code for WoS article
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EID of the result in the Scopus database
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