Počet záznamů: 1
Effect of notches on high temperature fatigue/creep behaviour of CMSX-4 single crystals
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SYSNO ASEP 0177709 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Effect 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, ORCIDZdroj.dok. Temperature-Fatigue Interaction. - Paris : Société Francaise de Métallurgie et de Matériaux, 2001 Rozsah stran s. 37-46 Poč.str. 10 s. Akce International Spring Meeting /9./ Datum konání 29.05.2001-31.05.2001 Místo konání Paris Země FR - Francie Typ akce WRD Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova superalloy single crystals ; notches ; Monkman-Grant relationship Vědní obor RIV JL - Únava materiálu a lomová mechanika CEP IAA2041002 GA AV ČR - Akademie věd KSK1010104 GA AV ČR - Akademie věd CEZ AV0Z2041904 - UFM-A Anotace Effect 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. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2002
Počet záznamů: 1