Počet záznamů: 1  

Effect of notches on high temperature fatigue/creep behaviour of CMSX-4 single crystals

  1. 1.
    SYSNO ASEP0177709
    Druh ASEPC - Konferenční příspěvek (mezinárodní konf.)
    Zařazení RIVD - Článek ve sborníku
    NázevEffect of notches on high temperature fatigue/creep behaviour of CMSX-4 single crystals
    Tvůrce(i) Lukáš, Petr (UFM-A)
    Preclík, Pavel (UFM-A)
    Kunz, Ludvík (UFM-A) RID, ORCID
    Čadek, Josef (UFM-A)
    Svoboda, Milan (UFM-A) RID, ORCID
    Zdroj.dok.Temperature-Fatigue Interaction. - Paris : Société Francaise de Métallurgie et de Matériaux, 2001
    Rozsah strans. 37-46
    Poč.str.10 s.
    AkceInternational Spring Meeting /9./
    Datum konání29.05.2001-31.05.2001
    Místo konáníParis
    ZeměFR - Francie
    Typ akceWRD
    Jazyk dok.eng - angličtina
    Země vyd.FR - Francie
    Klíč. slovasuperalloy single crystals ; notches ; Monkman-Grant relationship
    Vědní obor RIVJL - Únava materiálu a lomová mechanika
    CEPIAA2041002 GA AV ČR - Akademie věd
    KSK1010104 GA AV ČR - Akademie věd
    CEZAV0Z2041904 - UFM-A
    AnotaceEffect of notches on high temperature fatigue/creep strength of CMSX-4 single crystals has been investigated. Cylindrical bars of the orientation 001 with circumferential notches were tested at 850 °C under constant loads both without and with superimposed high frequency cyclic loads. Under creep conditions, the notched specimens exhibit a longer creep lifetime than the smooth specimens for the same net-section stress. Stress-strain analysis of the notched specimens subjected to constant loads was performed by an elastic-plastic FEM procedure; the experimentally determined creep data of smooth specimens were used as input data. An excellent correlation was found between the creep lifetime of the notched specimens and the average value of the calculated steady-state creep strain rate. The creep life curves of notched specimens were found to be identical with the creep life curves of smooth specimens when expressed in terms of Monkman-Grant diagram. Cyclic load components superimposed on static load reduce the time to failure. This reduction increases with increasing stress amplitude. Moreover, the mode of failure is changed from the ductile creep mode to the sharply localised fatigue mode.
    PracovištěÚstav fyziky materiálu
    KontaktYvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
    Rok sběru2002

Počet záznamů: 1  

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