Počet záznamů: 1

Double minimum creep of single crystal Ni-base superalloys

SYSNO ASEP	0464792
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Double minimum creep of single crystal Ni-base superalloys
Tvůrce(i)	WU, X. (DE) Wollgramm, P. (DE) Somsen, C. (DE) Dlouhý, Antonín (UFM-A)_{RID, ORCID} Kostka, A. (DE) Eggeler, G. (DE)
Celkový počet autorů	6
Zdroj.dok.	Acta Materialia. - : Elsevier - ISSN 1359-6454 Roč. 112, JUN (2016), s. 242-260
Poč.str.	19 s.
Jazyk dok.	eng - angličtina
Země vyd.	GB - Velká Británie
Klíč. slova	Single crystal Ni-base superalloys ; Primary creep ; Transmission electron microscopy ; Dislocations ; Stacking faults
Vědní obor RIV	JG - Hutnictví, kovové materiály
CEP	GA14-22834S GA ČR - Grantová agentura ČR
Institucionální podpora	UFM-A - RVO:68081723
UT WOS	000377326400024
EID SCOPUS	84964483770
DOI	10.1016/j.actamat.2016.04.012
Anotace	Low temperature (750°C) and high stress (800 MPa) creep curves of single crystal superalloy ERBO/1 tensile specimens loaded in the (001) direction show two creep rate minima. Strain rates decrease towards a first sharp local creep rate minimum at 0.1% strain (reached after 30 min). Then deformation rates increase and reach an intermediate maximum at 1% (reached after 1.5 h). Subsequently, strain rates decrease towards a global minimum at 5% (260 h), before tertiary creep (not considered in the present work) leads to final rupture. We combine high resolution miniature creep testing with diffraction contrast transmission electron microscopy and identify elementary processes which govern this double-minimum type of creep behavior. We provide new quantitative information on the evolution of microstructure during low temperature and high stress creep, focusing on γ-channel dislocation activity and stacking fault shear of the γ′-phase. We discuss our results in the light of previous work published in the literature and highlight areas in need of further work.
Pracoviště	Ústav fyziky materiálu
Kontakt	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Rok sběru	2017

Počet záznamů: 1