Abstract In order to advance material development for future nuclear systems, an insight into the cracking conditions of T91 ferritic-martensitic steel in heavy liquid metals (HLM) is provided. The paper critically reviews previous experimental data and summarizes them with new results. testing was performed contact slow flow static HLM study crack initiation, especially PbBi eutectic at 300°–350°C Pb 400°C about 1 × 10 −6 wt.% oxygen. Pre-stressed coupons were exposed up 2000 h. Constant...

In this work, the conditions for occurrence of Liquid Metal Embrittlement (LME) in ferritic-martensitic steel T91 contact with lead, Pb, were examined. Slow tensile tests notched specimens revealed that a temperature range close to melting point is sensitive LME (350–400 °C) and Solid Induced (SMIE) (300 °C). The cracking was stimulated by wetting (using chemical flux) notch effect. It found multi axial stresses state high level plastic strain front key factors triggering crack initiation.

Flow channel inserts (FCI) are functional components designed to minimize the magnetohydrodynamic pressure drop and also serve as a thermal tritium permeation barrier. In simplified design of FCI component, ceramic is directly exposed contact with Pb-16Li at elevated temperature. As must withstand mechanical stresses resulting from gradient during demanding operation, assessment response in essential. Pristine Al2O3 SiSiC were subjected three-point bending room temperature 650 °C argon....

The work is aimed on the coatings used as a barrier against Heavy Liquid Metal (HLM) influence and coated material behaviour under mechanical loading. comparison of two kinds deposited different steels examined: ferritic-martensitic steel T91 with AlTiN austenitic 316L Al2O3. Both samples underwent tensile tests constant extension rate in HLM autoclave-cell for testing. testing environment cell was liquid PbBi eutectic at temperature 550 °C. examination by Scanning electron microscopy...

Laser shock peening (LSP) is an innovative surface treatment technique for strengthening metallic materials. The improves fatigue performance and achieved by introducing compressive residual stresses into the material layer. are created over a significant area means of high pressure waves, which generated confining laser-induced plasma. In present study, LSP effect on life austenitic stainless steels was investigated changing laser parameters. tested steel 08CH18N10T. influence examined...

Dual Coolant Lithium Lead (DCLL) Breeding Blanket, which is using the eutectic lead-lithium alloy (Pb-16Li) as tritium breeder, neutron moderator and coolant, being developed in frame of EUROfusion project. Flow channel inserts (FCI) are insulating components embedded along Pb-16Li channels inside DCLL breeding blanket modules to minimize magnetohydrodynamic pressure drop heat losses. There an effort modify originally designed steel-ceramic-steel layered structure FCI by eliminating steel...

Zirconium based alloys are commonly used as material for fuel claddings in the light water reactors. Claddings act first metallic barriers against loss of fission products during nuclear power plant operation, intermittent storage or final dry storage. The integrity is always critical issue reactor operation and spent fuel. In this work, ring compression testing method developed was applied to study hydrogen embrittlement, evaluate stress-strain behaviour hoop fracture properties E110...

The austenitic steel 15-15Ti is being considered as one of the candidate materials for internal structural components future heavy liquid metal (HLM) nuclear systems. This work studies compatibility with PbBi. Constant extension rate tensile (CERT) tests tapered specimens were used to study sensitivity embrittlement (LME) and crack initiation. taper creates a variation stress along gauge length which allows identification strain appearance. Testing was performed in air PbBi 10−6 10−12 wt %...

The environmental performance of structural materials (e.g., corrosion and assisted cracking) is one the critical issues being addressed in development Generation IV fast reactors. This work aims to support study ferritic-martensitic steel T91 liquid lead, under close operation conditions, order assess its suitability for an application lead was tested air at 400 °C using static slow loading regimes. Applied stresses were chosen be slightly above yield strength evaluate threshold stress...

This study builds on experiments with different combinations of tension and torsion pre-stresses which were published in [1]. The results particularized by new tests for combined normal shear components. ratio between was 3:2 agreement the coefficient k c . same material structural low carbon ČSN 41 1523.1 steel after normalization annealing used specimens. compiled displayed a three-dimensional Haigh diagram normalized coordinates interlaid corresponding terminal lines.

Abstract The work is aimed on the NiCr-Cold spray coating applied GOST 08CH18N10T steel and 22K steel. Cold shows a high cohesion even as few millimeter thick layer, therefore it has potential for repairs not only of energy industry components. Applied substrate, cold can be considered bimetallic material purpose mechanical properties evaluation. Performed comparison based tensile at room temperature 350 °C separate steels versus combination discussed. main goal to find optimal approach...

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Abstract The presented paper is focused on laser shock-peening technology for hardening the metallic material surface. surface improve fatigue performance, static properties, and resistance to stress corrosion cracking of material, which achieved by creating a pressure residual with. shock waves, are generated confining laser-induced plasma cause large wave over significant area. In present study, effects peening (LSP) dynamic mechanical properties austenitic stainless steel nuclear industry...

V rámci projektu SUSEN rozšiřuje společnost CVŘ oblast výzkumu na prostředí těžkých tekutých kovů se zaměřením korozního vlivu média mechanické vlastnosti materiálů. Součástí je vývoj korozních autoklávů pro zkoušení tahových a únavových vlastností také v oblasti tečení. Zkušební cela určena zkoušky do teplot 600 °C s regulací obsahu kyslíku médiu (olovo, eutektikum olovo-bismut). Pro zabezpečení těsnosti umožnění regulace systému udržována ochranná atmosféra argonu provozním přetlakem 2...

Anisotropy of fuel claddings made from Fe-9Cr and Fe-14Cr ODS (oxide dispersion-strengthened) steel for Generation IV reactors with coolants based on liquid metals was examined. Basic mechanical tests were performed at temperatures 30 °C, 500 °C 625 thin-walled tubes. Tensile in axial tangential directions a vacuum to avoid oxidation the small specimens. A scanning electron microscope in-situ tensile testing device used conduct tests. The result this paper describes basic properties tubes as...

Tests of candidate construction materials for a heavy liquid metal environment are performed at Centrum Vyzkumu Rez. focused among other things on the influence corrosive environments mechanical properties T91 steel. Non-standard require special testing devices, which must be able to perform tests in lead or bismuth eutectic. An important issue is also monitoring oxygen volume, has an production and stability oxide layers therefore crack initiation. This article presents steel associated...

This paper describes the testing of thin-walled tubes made oxide dispersion-hardened steels based on yttrium oxides. Series mechanical and metallographic tests were carried out to evaluate basic material properties. These are candidate materials for manufacture fuel cladding generation IV nuclear reactors. Mechanical performed miniature specimens Fe-9Cr Fe-14Cr at 20 °C, 500 625 °C under vacuum. Metallographic, fractographic EBSD analyses used describe microstructure fracture mechanism...

Abstract This paper deals with the behavior of ferritic-martensitic steel T91 samples covered an AlTiN black coating, which is mainly used for high temperature applications (> 800 ° C) because its resistance to oxidation. The coating was applied by use a combination High Power Impulse Magnetron Sputtering (HiPIMS) and Direct Current (DCMS). Samples were subjected tensile test in static tank CALLISTO. environment liquid PbBi eutectic at 550° C. Two types samples, notch middle without...

In many industrial applications materials are subjected to degradation of mechanical properties as a result real service conditions. The assessment the remaining lifetime components and structures is commonly based on correlated procedures including numerous destructive, non-destructive mathematical techniques that should guarantee reasonable precise current damage extent in question remnant assessment. by X-ray diffraction technique fact most depend strongly crystallite size orientation...

Abstract The article is aimed on material properties evaluation of Ni and NiCr Cold Spray layers by means proportional small specimens. For the purpose testing, various cold spray were prepared. Spraying with nozzle for inner tube application from two powders different particle sizes powder one size was applied. In addition, spraying type outer applications same applied too. mechanical metallographic analysis as received after defined heat treatment, comparing standard testing It provide...