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Raddatz, M.; Schoene, S.; Oettel, R.; Seliger, P.
Forschungsvereinigung Verbrennungskraftmaschinen e.V., Frankfurt am Main (Germany); Technische Univ. Dresden (Germany). Inst. fuer Energiemaschinen und Maschinenlabor; Kraftwerks- und Anlagenbau AG, Pirna (Germany). Pruef- und Gutachterstelle fuer Bauteilmechanik, Werkstofftechnik und Schallschutz. Funding organisation: Bundesministerium fuer Wirtschaft, Bonn (Germany); Arbeitsgemeinschaft Industrieller Forschungsvereinigungen e.V., Koeln (Germany)1994
Forschungsvereinigung Verbrennungskraftmaschinen e.V., Frankfurt am Main (Germany); Technische Univ. Dresden (Germany). Inst. fuer Energiemaschinen und Maschinenlabor; Kraftwerks- und Anlagenbau AG, Pirna (Germany). Pruef- und Gutachterstelle fuer Bauteilmechanik, Werkstofftechnik und Schallschutz. Funding organisation: Bundesministerium fuer Wirtschaft, Bonn (Germany); Arbeitsgemeinschaft Industrieller Forschungsvereinigungen e.V., Koeln (Germany)1994
AbstractAbstract
[en] Defects in static components subjected to high temperatures - as e.g. turbine casings, containers, pipe specials - are primarily induced by the recurrent temperature gradients and transients, or the resulting hampered elongation of the material, due to non-steady operation. The examinations and experiments presented in this report achieved their objective, to significantly improve the accuracy of data describing the performance until incipient cracking of such anisothermally and LCF-stressed components with metal temperatures up to 600 C, taking as a basis the available isothermal LCF data of the materials and taking into account the non-linear materials behaviour at the given temperatures. Based on elongation-controlled isothermal LCF experiments with rod-type specimens, performed in the temperature range simulating operating conditions, and various anisothermal LCF experiments with various model shapes made of the cast materials GGG SiMo 3 and G-X 10 CrMoVNb 9.1, recommendations are derived from the correlation of measured/calculated numbers of stress cycles until incipient cracking, for formulation of laws and reference temperatures required for predicting the number of expected stress cycles until incipient cracking of high-temperature components. These recommended methods are verified by means of stress analyses of those highly stressed zones of pressurized casings of superheated steam turbines most at risk of crack initiation. (orig./CB)
[de]
Schaeden an ruhenden Hochtemperaturbauteilen - z.B. Anrisse an Turbinengehaeusen, Behaeltern und Rohrleitungs-Formstuecken - werden vor allem durch die bei instationaerem Betrieb in bestimmten Zeitabstaenden immer wieder auftretenden Temperaturgradienten und -transienten bzw. die daraus resultierenden behinderten Dehnungen hervorgerufen. Die Aussagegenauigkeit zum Anrissverhalten derartiger anisotherm LCF-beanspruchter Bauteile mit Metalltemperaturen bis zu 600 wird durch Untersuchungen im Rahmen dieser Arbeit unter Nutzung der stets nur verfuegbaren isothermen LCF-Werkstoffkennwerte und unter Beruecksichtigung des in diesem Temperaturbereich nichtlinearen Werkstoffverhaltens deutlich verbessert. Auf Grundlage dehnungsgesteuerter isothermer LCF-Versuche an Probestaeben und unterschiedlicher anisothermer LCF-Versuche an verschiedenen Modellkoerpern aus den Gusswerkstoffen GGG SiMo 3 und G-X 10 CrMoVNbN 9.1 werden im Einsatztemperaturbereich aus der Anrisszyklenzahl-Korrelation Messung/Rechnung Empfehlungen fuer Werkstoffgesetzformulierungen und Bezugstemperaturen zur Vorausberechnung der zu erwartenden Anrisszyklenzahlen an Hochtemperaturbauteilen abgeleitet. Diese Empfehlungen werden beispielhaft erprobt durch Beansruchungsanalysen fuer hochbelastete, anrissgefaehrdete Abschnitte der Hochdruckgehause von Heissdampfturbinen. (orig.)Original Title
Thermische Ermuedung moderner Hochtemperaturbauteile I. Abschlussbericht
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1994; 150 p; CONTRACT FVV 484; CONTRACT BMWI/AIF 47D; Available from TIB Hannover: RA 1581(571)
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AbstractAbstract
[en] The effect of strain induced martensite on the low cycle fatigue behavoir of AISI 304 austenitic stainless steel was investigated. During low cycle fatigue, the austenitic stainless steel showed continuous cyclic hardening. The extent of cyclic hardening was increased with decreasing austenite stability. The austenite stability was controlled by annealing time and temperature, which resulted in different carbide morphology. The continuous cyclic hardening behavior was considered to be resulted from the continuous martensitic transformation during low cycle fatigue. The amount of transformed martensite was measured with ferrite scope. (Author)
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Journal Article
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Journal of Engineering Science and Technology, College of Engineering, Korea University; v. 28 p. 129-139
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[en] We develop a damage calculation to describe low-cycle fatigue behavior of a martensitic stainless steel (12%Cr, Z20CDNV 12-1 type) at high temperature (350-6000C). The proposed model is applied to thermal fatigue life prediction
[fr]
On developpe un calcul d'endommagement en fatigue oligocyclique isotherme d'un acier inoxydable martensitique a 12%Cr, type Z20CDNV 12-1, dans le domaine de temperature 350-6000C. On montre comment le modele propose peut-etre utilise pour la prediction de duree de vie en fatigue thermiqueOriginal Title
Calcul de l'endommagement en fatigue a chaud d'un acier inoxydable martensitique. Application a la prevision de la duree de vie en fatigue thermique
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Comptes Rendus des Seances de l'Academie des Sciences. Serie 2; v. 295(3); p. 293-300
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AbstractAbstract
[en] Thermal-Fatigue is the main reason for the failures of many components under high temperature and cylices loading. In this paper experimental tests were carried out in order to predate the life of thermal fatigue of aluminum alloy. Fatigue-temperature interaction have been performed on Aluminum alloy (6063-T6) under varying temperatures and stress ratio R=−1.It was founded that the number of cylices to be failed decrease with increasing temperatures and the fatigue strength was also decrease with temperatures according to a power law. In high temperature conditions, the service interaction between temperature and fatigue occurs and it cause significant reduction of the number of cyclic. It is founded that the reduction life ratio (Nf Evaluated temperate /Nf Room Temperature) increase when temperature raise. (paper)
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International Conference on Materials Engineering and Science; Istanbul (Turkey); 8 Aug 2018; Available from http://dx.doi.org/10.1088/1757-899X/454/1/012145; Country of input: International Atomic Energy Agency (IAEA)
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IOP Conference Series. Materials Science and Engineering (Online); ISSN 1757-899X;
; v. 454(1); [9 p.]

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AbstractAbstract
[en] A sudden drop in power after a beam interruption leads to thermal fatigue effects in structural components in the blanket of an accelerator driven system. These thermal fatigue effects limit component lifetimes. A sudden return to power after a beam interruption can contribute significant additional thermal fatigue and greatly reduce component lifetimes. One obvious solution is a gradual return to power after a beam interruption. There are two potential problems with this solution. One problem involves interruptions that are longer than the thermal time constants of thin structural members but shorter than the time constants of thick structural members. In such a case, a gradual return to power reduces the additional thermal fatigue in the thin structural members but increases the thermal fatigue in thick structural members. Some compromise is necessary. The other problem is that for thick components with long thermal time constants a long, gradual return to power is required to minimize additional thermal fatigue. Such a slow return to power can reduce the utilization or the effective load factor of the system. Specific examples of beam interruptions with various assumptions on return to power are provided for a preliminary design for the blanket of the Accelerator Driven Test Facility. Also, mitigation options to increase component lifetime are discussed. These mitigation options include improving beam reliability and modifying the blanket design to better tolerate beam interruptions
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9 Aug 2001; [vp.]; AccApp-2001:Nuclear Applications in the New Millennium; Reno, NV (United States); 11-15 Nov 2001; W-31-109-ENG-38; Available from PURL: https://www.osti.gov/servlets/purl/797882-nzA6Pv/native/
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[en] By using the strain-range partitioning method, the fatigue life of high-heat-load components made of oxygen-free copper have been successfully predicted within a factor of two. Following a successful study on the prediction of fatigue life of high-heat-load components made of Glidcop, the thermal limitation of oxygen-free copper (OFC), which is used more commonly than Glidcop, has been studied. In addition to its general mechanical properties, the low-cycle-fatigue (LCF) and creep properties of OFC were investigated in detail and compared with those of Glidcop. The breaking mode of OFC, which was observed to be completely different from that of Glidcop in a fatigue fracture experiment, clarified the importance of considering the creep–fatigue interaction. An additional LCF test with compressive strain holding was conducted so that the creep–fatigue life diagram for out-of-phase thermal fatigue could be obtained on the basis of the strain-range partitioning method. The life predicted from elasto-plastic creep analysis agreed well with that determined from the void ratio estimated in the fatigue fracture experiment
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S0909049512041192; Available from http://dx.doi.org/10.1107/S0909049512041192; Available from http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4032024; PMCID: PMC4032024; PMID: 23254657; PUBLISHER-ID: hf5213; OAI: oai:pubmedcentral.nih.gov:4032024; Copyright (c) Sunao Takahashi et al. 2013; This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.; Country of input: International Atomic Energy Agency (IAEA)
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Dziedzic, A.; Linczerski, B.W.
Materials of the 16. international spring seminar on electronic technology. Thick and thin film sensors1993
Materials of the 16. international spring seminar on electronic technology. Thick and thin film sensors1993
AbstractAbstract
[en] This paper briefly discusses the results of a systematic study of thermal ageing in thin film resistors over high-temperature range (from 400 up to 600 C). The relative changers in resistance and changes in TCR have been studied as a function of ageing temperature and time, aspect ratio and termination material. Termination effects for RuO2/Au and RuO2/Pd-Ag systems have been separated from intrinsic (bulk) stability of resistive material. The combination of commercially available Du Pont resistive composition and Polish-made Au conductor permits for continuous or semicontinuous long-term operation at 400 C. (author). 8 refs, 2 figs
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RuO2 has been used
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Politechnika Wroclawska, Wroclaw (Poland); 158 p; 1993; p. 24-27; Wroclaw Technical University; Wroclaw (Poland); 16. International Spring Seminar on Electronic Technology: Thick and Thin Film Sensors; Szklarska Poreba (Poland); 25-28 Apr 1993; KBN GRANT NO. 8-0127-91-01; Available from Wroclaw Technical University, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
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AbstractAbstract
No abstract available
Original Title
Issledovanie rannikh stadij termicheskoj ustalosti monokristallov molibdena i vol'frama
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For English translation see the journal Russ. Metall.
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Izvestiya Akademii Nauk SSSR, Metally; (no.5); p. 204-207
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No abstract available
Original Title
Evaluation des risques de deformation progressive et de rochet thermique
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International Atomic Energy Agency, Vienna (Austria); Proceedings series; 415 p; ISBN 92-0-050883-9;
; 1983; p. 151-153; IAEA; Vienna; International symposium on reliability of reactor pressure components; Stuttgart (Germany, F.R.); 21-25 Mar 1983; IAEA-SM--269/59; Published in summary form only.

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Pilz, A.T.
Oxford Univ. (United Kingdom)1996
Oxford Univ. (United Kingdom)1996
AbstractAbstract
No abstract available
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1996; 418 p; Available from British Library Document Supply Centre- DSC:D199242; Thesis (Ph.D.)
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