Performing and evaluating creep tests

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F15%3A00450291" target="_blank" >RIV/68081723:_____/15:00450291 - 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

Performing and evaluating creep tests

Popis výsledku v původním jazyce

In this work we show that creep tests deliver much more information. The evolution of total strain with increasing stress gives the apparent elastic modulus and a stress-strain curve from which the yield stress may be derived. After the maximal creep load is reached, the test gives the evolution of inelastic strain rate with strain. Fracture processes make deformation nonuniform. So it is useful to separate changes of specimen length resulting from fracture from those resulting from dislocation glide bycomparing the behaviours in tension ending in tensile fracture and compression where fracture is suppressed. We show that the state of the crystallite boundaries are of prime importance for strength and ductility. When the boundaries change from LAB toHAB, dislocation motion and strength are influenced by enhanced obstacle strength and by enhanced dynamic recovery. As the two effects oppose each other, it depends on the testing conditions. Generating hard finely distributed particles i

Název v anglickém jazyce

Performing and evaluating creep tests

Popis výsledku anglicky

In this work we show that creep tests deliver much more information. The evolution of total strain with increasing stress gives the apparent elastic modulus and a stress-strain curve from which the yield stress may be derived. After the maximal creep load is reached, the test gives the evolution of inelastic strain rate with strain. Fracture processes make deformation nonuniform. So it is useful to separate changes of specimen length resulting from fracture from those resulting from dislocation glide bycomparing the behaviours in tension ending in tensile fracture and compression where fracture is suppressed. We show that the state of the crystallite boundaries are of prime importance for strength and ductility. When the boundaries change from LAB toHAB, dislocation motion and strength are influenced by enhanced obstacle strength and by enhanced dynamic recovery. As the two effects oppose each other, it depends on the testing conditions. Generating hard finely distributed particles i

Druh

O - Ostatní výsledky

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/ED1.1.00%2F02.0068" target="_blank" >ED1.1.00/02.0068: CEITEC - central european institute of technology</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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