Dwell effect on low cycle fatigue behaviour  of cast superalloy Inconel 792-5A at 800 °C

Šmíd, Miroslav; Obrtlík, Karel; Polák, Jaroslav

Number of the records: 1

Dwell effect on low cycle fatigue behaviour of cast superalloy Inconel 792-5A at 800 °C

1.

SYSNO ASEP	0421225
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Dwell effect on low cycle fatigue behaviour of cast superalloy Inconel 792-5A at 800 °C
Author(s)	Šmíd, Miroslav (UFM-A)_{RID, ORCID} Obrtlík, Karel (UFM-A)_{RID, ORCID} Polák, Jaroslav (UFM-A)_{RID, ORCID}
Number of authors	3
Source Title	Proceedings of the Seventh International Conference on Low Cycle Fatigue - LCF7. - Berlín : DMV, 2013 - ISBN 978-3-9814516-2-7
Pages	s. 113-118
Number of pages	6 s.
Publication form	Print - P
Action	LCF7 - International Conference on Low Cycle Fatigue /7./
Event date	09.09.2013-11.09.2013
VEvent location	Aachen
Country	DE - Germany
Event type	WRD
Language	eng - English
Country	DE - Germany
Keywords	nickel base superalloy ; low cycle fatigue ; dwell ; high temperature fatigue ; surface relief ; dislocation structure
Subject RIV	JL - Materials Fatigue, Friction Mechanics
R&D Projects	GAP204/11/1453 GA ČR - Czech Science Foundation (CSF)
	GAP107/11/2065 GA ČR - Czech Science Foundation (CSF)
	FR-TI4/030 GA MPO - Ministry of Industry and Trade (MPO)
Institutional support	UFM-A - RVO:68081723
Annotation	The present paper is focused on the study of the effect of tensile and compressive dwells on the stress-strain behaviour, fatigue life and deformation mechanisms in cast polycrystalline nickel base superalloy Inconel 792-5A at temperature 800 °C in air. Button-end specimens were fatigued with constant strain rate and constant total strain range. Dwell time was 10 minutes. Cyclic hardening/softening curves, stress-strain curves and fatigue life curves have been obtained for continuous cycling and cycling both with tensile and with compressive dwells. Fatigue life curves do not result in any significant reduction of the fatigue life. Surface relief was observed using scanning electron microscopy. It strongly depends on the type of fatigue test and the value of total strain amplitude. Internal structure, studied by transmission electron microscopy, was dependent on the strain amplitude and type of test. Bands of high dislocation density were observed only in continuous cycling.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2014

Number of the records: 1