microstructure and creep properties of magnesium alloys used in thermal nuclear reactors.

by J. E. Harris

Publisher: University of Birmingham in Birmingham

Written in English
Published: Downloads: 630
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Edition Notes

Thesis (D.Sc.) - Univ. of Birmingham, Dept of Physical Motallurgy and Science of Materials.

ID Numbers
Open LibraryOL20282333M

DS Copper Alloys Physical Properties of Copper and Copper Alloys Mechanical Properties of Copper and Copper Alloys Tensile Properties Fracture Toughness Creep Fatigue and Creep–Fatigue Irradiation Effects in Copper and Copper Alloys Cited by: for materials used in the core of a nuclear reactor, it is important that they have specific proper-ties such as low neutron absorption and high resistance to radiation-induced creep, hardening and the associated loss of ductility so that reactors can operate for the decades expected by plant Size: 2MB. @article{osti_, title = {Effect of Pre-Weld Heat Treatment on Microstructure and Creep Strength of ICHAZ in Grade 91 Steel}, author = {Wang, Yiyu and Zhang, Wei and Feng, Zhili}, abstractNote = {In this work, Grade 91 base metal was normalized with two different cooling conditions, water quenching and air cooling. The intercritical welding thermal cycle simulated by using the . Structural Materials for Generation IV Nuclear Reactors explores the current state-of-the art in these areas. Part One reviews the materials, requirements and challenges in generation IV systems. Part Two presents the core materials with chapters on irradiation resistant austenitic steels, ODS/FM steels and refractory metals amongst others.

  The influence of plastic deformation (creep) of corrosion-resistant 10Kh23N18, 04Kh18N10Т, and AISI steels on the decrease in the thickness of the shell wall and the intensification of corrosion fracture processes is investigated. The comparative evaluation of the materials used in the retort production is performed. It is shown that the application of 10Kh23N18 steel with improved creep Cited by: 1.   SiC and Al 18 B 4 O 33 particle/whisker reinforced (AZ91D) magnesium alloy matrix composites were fabricated by the melt stirring and casting and the squeeze casting. Some composites were fabricated under the semi-solid conditions and extruded at high temperature in order to improve the mechanical by: 6. @article{osti_, title = {Underclad cracking of pressure vessel steels for light-water reactors}, author = {Lopez, H F}, abstractNote = {Although fracture mechanics analyses have shown that underclad cracks have no detrimental effect on the integrity of thick walled pressure vessels (40 year service), in order to avoid unexpected failures the US Nuclear Regulatory Commission has issued.   To have a better understanding of the degradation process during high temperature long-term service and to provide practical data for the engineering design of the IHX, aging experiments were performed on alloy and alloy at ° C and ° C ⁠. Mechanical properties (hardness and tensile strength) and microstructure were analyzed Cited by:

INCONEL ® alloy Physical Constants and Thermal Properties Some physical constants and thermal properties of IN-CONEL alloy are shown in Tables 2 and 3. Low-temperature thermal expansion, based on measure-ments made by the National Bureau of Standards, is shown in Figure 1. Elevated-temperature modulus of elasticity data are given in File Size: KB. Specific yield and ultimate strength of the investigated alloy were reported to be higher if compared to the more common AZ91 magnesium alloys and comparable to that of the widely used A cast aluminum alloy. Microstructure and mechanical properties of a rare earth rich magnesium casting alloy V. Angelini, I. Boromei, L. Ceschini, A. MorriFile Size: 1MB. A New Book: Light-Water Reactor Materials Authored by Donald R. Olander (corresponding author) of the Department of Nuclear Engineering at the University of California, Berkeley, and Arthur T. Motta of the Department of Mechanical and Nuclear Engineering at the Pennsylvania State University.. The contents of a new book currently in preparation are described. Interrelation of Microstructure and Corrosion Resistance in Biodegradable Magnesium Alloys with Aluminum, Lithium weight ratio. At present time, magnesium alloys are com-monly used in the automotive industry, but their biocom- temperature creep resistant alloy [7] and is considered forCited by: 1.

microstructure and creep properties of magnesium alloys used in thermal nuclear reactors. by J. E. Harris Download PDF EPUB FB2

Creep of zirconium alloys in a light water reactor environment plays an important role in many. situations of interest to reactor safety. During normal operation of fuel rods the external pressure.

will lead to creep down of the cladding so that the gap between fuel and cladding becomes. closed. This chapter reviews zirconium alloys (Zr-alloys) that are used as fuel cladding and other core components in light water reactors (LWRs).

It emphasizes key factors pertaining to fabrication and microstructure, corrosion and crud buildup, concurrent hydriding and mechanical integrity, as well as effects of irradiation on the alloy. The Gd-containing alloy has superior tensile properties to the alloys containing Dy or Y.

Differences have been noted between the alloys in terms of precipitation reaction kinetics and precipitate. Irradiation creep is the sum of both irradiation enhanced creep (thermal creep increase due to irradiation) and irradiation-induced creep.

Performance of fuel, clad tube, and other in-core components of a nuclear reactor can be affected by the dimensional changes caused by creep.

Zirconium and zirconium alloys have been widely used in nuclear industry because of the appreciative combination of mechanical properties, much lower thermal neutron absorption cross-section and Author: S.

Banerjee. In this study, the microstructure, thermal conductivity and mechanical properties of Mg–Mn–xCe alloys are systematically investigated. The thermal conductivity and mechanical properties of Mg–Mn–xCe alloys are obtained and the results are correlated with their microstructures and textures, to reveal the mechanism of Ce on thermal conductivity and mechanical properties of Mg–Mn by: Important creep parameters, i.e., secondary creep rate and creep strength, for the new alloys are reported.

Creep properties of the new alloys are significantly better than those of the AE42 (Mg-4 pct* Al-2 pct RE**) alloy, which is the benchmark creep-resistant magnesium die-casting by: T.

Muroga, in Structural Materials for Generation IV Nuclear Reactors, Potential improvements of the properties. The operation temperature window of V-4Cr-4Ti is limited by radiation embrittlement on the lower-temperature side and thermal creep. The microstructure, tensile properties and creep behavior of Mg–5Al based alloys with strontium and titanium additions were investigated.

Small additions of strontium mainly dissolved into Mg 17 Al 12 particles and increased the thermal stability and creep strength, since they did not cause the formation of any new phase in the microstructure.

Small additions of strontium could refine the as Cited by: V and Ta can improve creep properties, reduce grain size, and enhance the toughness and strength of the alloys [44,45]. Fe has excellent ductility [46] and is inexpensive. The effect of the rhenium addition to molybdenum in powder metallurgy sheet product near and exceeding the saturation point of rhenium in molybdenum was investigated.

Alloys of 41, and 51% rhenium were produced to examine the mechanical properties at room temperature, K, and. In this paper microstructure and creep properties of Mg-Al-Ca-Sr, Mg-Zn-RE-Zr and Mg-Sn-Si gravity casting magnesium alloys are presented.

The microstructure was characterized using light microscopy, scanning and transmission electron microscopy. Phase identification was made by SAED and XRD analysis.

Creep tests were carried out in the temperature range from °C to Author: Tomasz Rzychoń. Zirconium alloys are frequently used as a structural mate- rial in the core of nuclear reactors because of its small cross section for thermal neutrons, meaning that interfer- ence between the.

alloys offer good creep resistance and low cost which can meet the materials requirements for automotive powertrain appli-cations. The present paper reports the microstructure, tensile properties and creep behavior of five alloys based on Mg–Al–Sr.

The mechanical properties and microstructure of magnesium-aluminum based alloys containing strontium are reviewed, and the considerable discrepancy among the research results is discussed.

Special attentions are paid to the mechanical properties, compounds and grain refinement of Mg-Al-Sr based alloys. For ensuring the improved mechanical properties of more largeDescription of used alloys The main alloying element of magnesium alloys is aluminium. For experimental evaluation both commonly used alloys (AZ 91, AZ 91 Be), and the AMZ 40 and AJ 62 alloys too were chosen that weren’t industrially processed in the Czech Republic yet.

Abstract: In this paper microstructure and creep properties of Mg-Al-Ca-Sr, Mg-Zn-RE-Zr and Mg-Sn-Si gravity casting magnesium alloys are presented. The microstructure was characterized using light microscopy, scanning and transmission electron microscopy.

Phase identification was made by SAED and XRD analysis. Abstract. The new generation of zirconium-refined magnesium-rare earth alloys have assumed considerable commercial importance because of their light weight, high specific strength, good castability, excellent damping resistance, corrosion resistance similar to or better than many aluminium alloys and high resistance to creep deformation up to a temperature of ° by: 1.

and mechanical properties of Mg-6Al magnesium alloy were studied in this work. 1 Experimental details High-purity Mg (%) and Al (%), Mg-Y and Mg-Nd master alloys were used as raw materials.

The studied alloy was designed as MgAl-xRE, where x is the total content of RE elements, x=0, respectively.

The mass. reactors in the U.S. Navy nuclear program, in The design of efficient reactors requires the use of cladding materials that have very low neutron absorption cross section, while maintaining a good combination of other mechanical and chemical properties.

The Although the first naval reactor used pure Zr, the zirconium-based alloy. Several families of magnesium die-casting alloys have been developed to operate at the elevated temperatures experienced in automotive powertrain applications. Most alloys are based on the Mg-Al system with alloying additions such as silicon, strontium, calcium, and rare earth elements (RE), although alloys with RE as the primary alloying constituent are also by: properties, very low thermal neutron cross section, and can be manufactured using standard fabrication techniques.

The various zirconium alloy grades used in water-cooled nuclear reactors are also available for nuclear waste disposal components. Reactor grade designates that the material has low hafnium content suitable for nuclear service. mechanical properties of magnesium alloys due to solid-solution strengthening and fine dispersion of inter- metallic phases [24,25].

Little information was found about the influence of rare-earth elements on the me- chanical properties or microstructure of magnesium- lithium alloys. The aluminized layer of stainless steel was treated by laser shock processing (LSP). The effects of constituent distribution and microstructure change of the aluminized layer in stainless steel on creep performance at high temperature were investigated.

SEM and EDS results reveal that aluminized coating is mainly composed of an Al 2O3 outer layer, the transition layer Author: Wei Li, Huang Huang, Dongliang Xu, Jian Chen, Lu Zuo, Guozhi Ma, Jianjun He, Cong Li, Zhuoyin Peng.

@article{osti_, title = {Advanced high-temperature alloys: Processing and properties}, author = {Allen, S.M. and Pelloux, R.M. and Widmer, R.}, abstractNote = {Achievements in high-temperature metallurgy, solidification, and metals processing are highlighted in 16 conference papers.

The first section is on solidification. It discusses direct casting of coilable ferrous alloy strips. Plutonium and Its Alloys From atoms to microstructure Siegfried S.

Hecker. practical interest principally because the isotope has attractive nuclear properties for energy production and nuclear explosives. Manhattan Project physicists managed to extract Burning as fuel in nuclear reactors.

The thermal stability and creep behaviour of MgNi2Y1CeMM1 and MgNi3YCeMM alloys have been investigated at and K. Both alloys were processed by a powder metallurgy route involving rapid solidification of powders, cold isostatic pressing and extrusion at K.

The microstructure of both alloys was studied in the as-extrusion condition and after thermal treatments at and K Author: P. Pérez, K. Milicka, Jose Maria Badía, G. Garcés, J.M. Antoranz, S. González, F. Dobes, P. Adeva. Microstructure and tensile creep behaviour of the die-cast AE44 and AJ62 magnesium alloys has been studied at temperatures between °C and °C and at stresses in the range from 60 to 75 MPa.

At the °C the AJ62 and AE44 alloys exhibit good creep resistance after h creep deformation. At °C the AE44 alloy shows still good creep resistance, whereas in the case of AJ62 alloy the Cited by: 3.

Abstract. The effects of deformation ageing treatment (DAT) on the microstructure and properties of aluminum alloy were investigated. The alloy was subjected to deformation ageing treatment which included solution treating at deg.

C quenching into water at room-temperature, cold rolling (10%) and further ageing to peak hardness level at deg. Keywords: Magnesium matrix composite, Microstructure, WE43 alloy, Stir casting 1. Introduction In recent years, magnesium alloys have been used in a variety of structural applications due to their high specific strength at ambient temperature and good castability.

On the other hand, theFile Size: KB. The physical properties of magnesium alloys are affected by their microstructure evolution. The effects of extrusion, rolling and severe plastic deformation (SPD) techniques (such as ECAP, HPT, ARB) on their physical properties should be investigated, SPD provides a technique suitable for producing microstructures with ultrafine grains.Magnesium alloys are mixtures of magnesium with other metals (called an alloy), often aluminum, zinc, manganese, silicon, copper, rare earths and ium is the lightest structural metal.

Magnesium alloys have a hexagonal lattice structure, which affects the fundamental properties of these alloys.

Plastic deformation of the hexagonal lattice is more complicated than in cubic. Mg-Al-Mn (AM) based cast alloys were optimized for balanced tensile properties (strength and ductility) and response to heat treatment. The microstructure and mechanical property tests suggest that an aluminum content of 7–8% Al is optimum in these alloys for structural by: