Specific features of high-cycle and ultra-high-cycle fatigue

0177710 - UFM-A 20013215 RIV SIGLE AT eng C - Konferenční příspěvek (zahraniční konf.)
Lukáš, Petr - Kunz, Ludvík
Specific features of high-cycle and ultra-high-cycle fatigue.
Fatigue in the Very High Cycle Regime. Vienna: BOKU, 2001 - (Stanzl-Tschegg, S.; Mayer, H.), s. 23-33
[International Conference on Fatigue in the Very High Cycle Regime. Vienna (AT), 02.06.2001-04.06.2001]
Grant CEP: GA AV ČR IAA2041002; GA AV ČR KSK1010104
Výzkumný záměr: CEZ:AV0Z2041904
Klíčová slova: ultra-high-cycle fatigue * fatigue mechanisms * cyclic plastic deformation
Kód oboru RIV: JL - Únava materiálu a lomová mechanika

Several specific features of high-cycle fatigue (HCF) and ultra-high-cycle fatigue (UHCF) are discussed both on the basis of direct experimental results and on the basis of speculations extrapolating HCF data to the UHCF regions. The following points are dealt with: (i) Extent and distribution of cyclic plastic deformation. (ii) Sensitivity of the fatigue behaviour in the HCF and UHCF regions to the start-up procedure of the test and to the preceding stress-strain history. (iii) Role of persistent slip bands (PSBs) and the microcrack initiation in the HCF and UHCF regions. (iv) Dependence of the notch sensitivity on the amplitude of cycling. (v) Effect of high number of very small amplitude cycles on creep behaviour of superalloy single crystals.
Trvalý link: http://hdl.handle.net/11104/0074629