Correct Interpretation of Creep Rates: A Case Study of Cu

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F15%3A00450057" target="_blank" >RIV/68081723:_____/15:00450057 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jmst.2015.09.012" target="_blank" >http://dx.doi.org/10.1016/j.jmst.2015.09.012</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmst.2015.09.012" target="_blank" >10.1016/j.jmst.2015.09.012</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Correct Interpretation of Creep Rates: A Case Study of Cu

Popis výsledku v původním jazyce

Traditionally the deformation resistance in creep is characterized by the minimum creep rate and its sensitivity to stress and temperature. The present case study of coarse-grained Cu at 573 K yields a stress exponent n = 9 and a relatively low activation energy. The evolution of the deformation resistance with strain at constant tensile creep load and comparison with creep in compression without fracture indicates that the tensile ?_min result from transition from uniform deformation to strain localization during fracture. This is confirmed by the results of creep in compression where fracture is suppressed. Both the tensile and the compressive creep rate at strains around 0.3 can be described using existing equations for quasi-stationary deformationcontaining the subgrain boundary misorientation ? as structure parameter. While in the latter case constant ? leads to monotonic increase of n with stress, the tensile nine-power-law results from variable ?, and has no simple meaning. The

Název v anglickém jazyce

Correct Interpretation of Creep Rates: A Case Study of Cu

Popis výsledku anglicky

Traditionally the deformation resistance in creep is characterized by the minimum creep rate and its sensitivity to stress and temperature. The present case study of coarse-grained Cu at 573 K yields a stress exponent n = 9 and a relatively low activation energy. The evolution of the deformation resistance with strain at constant tensile creep load and comparison with creep in compression without fracture indicates that the tensile ?_min result from transition from uniform deformation to strain localization during fracture. This is confirmed by the results of creep in compression where fracture is suppressed. Both the tensile and the compressive creep rate at strains around 0.3 can be described using existing equations for quasi-stationary deformationcontaining the subgrain boundary misorientation ? as structure parameter. While in the latter case constant ? leads to monotonic increase of n with stress, the tensile nine-power-law results from variable ?, and has no simple meaning. The

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JJ - Ostatní materiály

OECD FORD obor

—

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

Název periodika

Journal of Materials Science & Technology

ISSN

1005-0302

e-ISSN

—

Svazek periodika

31

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

4

Strana od-do

1065-1068

Kód UT WoS článku

000365239600001

EID výsledku v databázi Scopus

2-s2.0-84947424971