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Tuesday, November 24, 2020 | History

3 edition of Long-time creep behavior of Nb-1Zr alloy containing carbon found in the catalog.

Long-time creep behavior of Nb-1Zr alloy containing carbon

Long-time creep behavior of Nb-1Zr alloy containing carbon

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Published by U.S. Dept. of Energy, Nuclear Energy, Reactor Systems Development and Technology, For sale by the National Technical Information Service in Washington, D.C, Springfield, Va .
Written in English

    Subjects:
  • Metals -- Creep.,
  • Niobium alloys.

  • Edition Notes

    Other titlesLong time creep behavior of Nb-1Zr alloy containing carbon
    StatementR.H. Titran.
    SeriesNASA TM -- 100142, NASA technical memorandum -- 100142..
    ContributionsUnited States. Office of the Assistant Secretary for Nuclear Energy. Deputy Assistant Secretary for Reactor Systems Development and Technology., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17099652M

    Description: UNS N / UNS N Incoloy 8Incoloy H is an iron-nickel-chromium alloy having the same basic composition as Incoloy , with significantly higher creep rupture strength. The higher strength results from close control of carbon, aluminum and titanium contents in conjunction with Elongation: 25 %. To cope with the shortcomings of nuclear fuel design exposed during the Fukushima Nuclear Accident, researchers around the world have been directing their studies towards accident-tolerant fuel (ATF), which can improve the safety of fuel elements. Among the several ATF cladding concepts, surface coatings comprise the most promising strategy to be specifically applied in engineering.


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Long-time creep behavior of Nb-1Zr alloy containing carbon Download PDF EPUB FB2

LONG-TIME CREEP BEHAVIOR OF THE Nb-1Zr ALLOY CONTAINING CARBON R.H. Titran National Aeronautics and Space Administration Lewis Research Center Cleveland, Ohio SUMMARY A preliminary study was conducted to determine the feasibility of using a ed ( wt 96) Nb-lZr alloy to meet the elevated temperature requirements of advanced space power.

Get this from a library. Long-time creep behavior of Nb-1Zr alloy containing carbon. [Robert H Titran; United States. Office of the Assistant Secretary for Nuclear Energy. Deputy Assistant Secretary for Reactor Systems Development and Technology.; United.

Creep tests were conducted on the Nb-1Zr base alloy with and without carbon. Testing was performed at 10 to the -6 MPa in the to K range. Creep times, to 1 percent strain, ranged from 60 to hr. All 1 percent creep data were filled by linear regression to a temperature compensating rate : R.

Titran. Creep tests were conducted on the Nb-1Zr base alloy with and without carbon. Testing was performed at 10 to the -6 MPa in the to K range. Creep times, to 1 percent strain, ranged from   Titran investigated the long time high vacuum creep behavior of Nb–1Zr alloy at °C.

The creep studies on Nb–1Zr alloys carried out by Davidson et al. showed that the creep strength of Nb–1Zr at °C was higher than that of Nb. Neutron irradiation upto dpa at temperatures ofand °C resulted in increased strength and reduced elongation of Nb– by:   However, the advantage of Nb–Zr alloys is that they are easier to fabricate as compared to Mo and Ta alloys.

Investigations on both Nb–1Zr and Nb–1Zr–C carried out in s and s dealt primarily with precipitation characteristics in the carbon containing alloy,, and the creep behavior for both alloys.

Pre creep Fig. 1 the creep behavior of T (Ta–8W–2Hf), ASTARC (Ta–8W–1Re–Hf–C), Mo-TZM (Mo–1Ti–Zr), Nb–1Zr and PWC (Nb–1Zr–C), the refractory metal alloys of interest for the space nuclear power applications are compared using the Larson Miller parameter with an arbitrary constant value of 15 using times to reach 1% creep strain.

The microstructural evolution of Nb-1ZrC alloy deformed to a true strain of, and at temperatures of and °C and strain rate of s − 1 was examined by using EBSD. Fig. 2 shows the inverse pole figure (IPF) map of Nb-1ZrC alloy deformed at °C and s − Fig.

2 the black lines represent high angle grain boundaries (HAGB misorientation angle. A further addition of wt pct of carbon (C) was found to be effective in improving the creep strength of Nb-1Zr alloy ([17][18][19][20][21][22][23] [24]. The resulting alloy with. Irradiation temperatures of ~ – T m can cause void swelling, He embrittlement, and irradiation creep in Nb alloys depending on the neutron fluences.

For Nb and Nb-1Zr, swelling associated with void formation is MeV [32, 99, ]. Fig. shows the temperature range for void swelling in Nb-1Zr is ~ – K for doses up to.

R.H. Titran, Long-Time Creep Behavior of Nb-1Zr Alloy Containing Carbon, NASA Technical Report (Document ID: ), R.H. Titran, Creep Strength of Niobium Alloys, Nb-1% Zr and PWC, National Aeronautics and Space Administration, Cleveland, OH, The creep behavior of W/Nb composite material was determined at and K in vacuum over a wide range of applied loads.

alloy (Nb-1Zr) and the PWC nominally containing 0 to 70 vol. Therefore, this alloy has been closely associated with the nuclear industry, which requires specified elevated temperature strength in the range of º F to º F.

Because of the increasing need for better strengths, as technology has advanced, Nb-1Zr has been replaced by alloys such as C, which has greater strength and thus improved.

Therefore, these data were used to investigate further how the rupture behavior after a long time can be estimated within a short time and to what extent we can get a sign of creep degradation.

Figure 7 shows the analysis results for time to pct strain of 11Cr-2WMo-1Cu-Nb-V steel pipes obtained employing the exponential-law method. Under these conditions, the alloy containing wt.% carbon had no measurable creep strain af hr.

However, the Nb-lZr alloy achieved 2 percent strain in nea hr, and it had a total creep strain of more than 4 percent after ab hr of testing. The Nb-lZr alloy containing carbon owes its superior creep resistance to the.

Purchase Carbon Alloys - 1st Edition. Print Book & E-Book. ISBNIn order to improve the creep strength of the heat resistant steels at elevated temperatures over °C, a new attempt has been demonstrated using carbon and nitrogen free Fe-Ni martensitic and austenitic alloys strengthened by Laves phase such as Fe2W and Fe2Mo.

It is important that these alloys are independent of any carbides and any carbo-nitrides as strengthening factors. Creep behavior in the new ADTM nickel-based disk superalloy – Influence of aging heat treatment and local chemical fluctuations Materials Science and Engineering: A, Vol.

Effect of heat treatment on mechanical property and microstructure of a powder metallurgy nickel-based superalloy. Creep behavior of the ZrNbSnFeCu alloy sheet is investigated from ° C to ° C in the stress range from 50 MPa to MPa along the rolling direction.

The measured strain rates range from × 10 −10 s −1 to × 10 −7 s −1. The activation energies are estimated to assess the creep deformation mechanisms in. Specimen after Creep-Rupture Testing showing that Failure occurred in the Base Metal Material.

The high temperature (> Tm) creep strength of PNC-II, relative to the order of magnitude lower carbon content Nb-l%Zr alloy, has been attributed to the presence of very flne precipitates of (Nb,Zr)2C and/or (Nb,Zr)C ranging in. Niobium Zirconium (Nb-1Zr) Alloy Wire Description: ALB Materials Inc is a global supplier of Niobium Zirconium (Nb-1Zr) Alloy Wire and we can provide customized niobium products.

Niobium Zirconium (Nb-1Zr) Alloy Wire Applications: Used for the manufacturing of reaction vessels. A Nb-1ZrC alloy was creep tested at and /sup 0/K (approximately 1/2 melting point) and the data compared to similar results from tests of a Nb-1Zr alloy.

The Nb-1Zr-C alloy in the annealed condition (1 hr at /sup 0/K plus 2 hr at /sup 0/K) was more than five times stronger than the annealed (1 hr at K) Nb-1Zr alloy.

The invention relates to a ferritic heat-resistant steel. By combining the addition of elements with an affinity for oxygen, its behavior at high application temperatures is to be improved. In addition to stabilizing the electrical resistance of heating elements with the addition of zirconium, titanium and rare earth metals, the creep elongation of the steel at temperatures above ° C is.

The modification has yielded the stable and protective oxide film formation (ref. 1) to insure improved compatibility with the helium environment. It has been demonst rated that the alloy performs better than Hastelloy X in corrosion tests under thermal cycling, and creep behavior under low stress and long time.

Titran and R. Hall, Ultra-High Vacuum Creep Behavior of Columbium and Tantalum Alloys at and F for Times Greater than Hours, NASA TM X, Google Scholar Effects of Microstructural Change and Oxidation on Creep Behavior of P23/T23 Steels.

Sawada, K Creep Property of Carbon and Nitrogen Free High Strength New Alloys Type IV Damage Mechanism Due to the Microstructure Weakening in the HAZ of a Multi-layer Welded Joint of the W Containing 9%Cr Ferritic Creep Resistant Steel.

Hasegawa, Y. Technical Report: Effects of long-term aging on ductility of the columbium alloys C, Cb-1Zr, and Cb and the molybdenum alloy Mo-TZM. Effects of long-term aging on ductility of the columbium alloys C, Cb-1Zr, and Cb and the molybdenum alloy Mo-TZM.

Need to evaluate creep damage in carbon steel (SA Gr 70/SA Gr B) at °C short term exposure ([email protected] °C, balance [email protected] °C in total life of Hr).ASME IID gives allowable stresses up to °C but doesn't permit use beyond °C.

Recall Fig. b, which showed tensile creep strain at ambient temperature as a function of time for two different stacking sequences (Sturgeon ).

At a given stress level, the laminate with carbon fibers at ±45° showed more creep strain than one containing plies at 0°/90°/±45°. played an important part. Plain carbon steels are limited in use above a certain tem-perature, say °C., due to comparatively poor creep properties and low resistance to corrosion.

Even at low temperatures up to about °C., where steels are strong, there are non-ferrous alloys like copper-base, magnesium-base and aluminium-base alloys.

Books Journals Engineering Research. Applied Mechanics and Materials Advances in Science and Technology International Journal of Engineering Research in Africa Advanced Engineering Forum Journal of Biomimetics, Biomaterials and Biomedical Engineering Materials Science.

@article{osti_, title = {A REVIEW PAPER ON AGING EFFECTS IN ALLOY FOR GEN IVNUCLEAR REACTOR APPLICATIONS}, author = {Ren, Weiju and Swindeman, Robert W}, abstractNote = {To understand the response of Alloy to long-time exposure conditions and determine the supplementary data needs for structural components in Gen IV nuclear reactors, the.

Creep and rupture tests were conducted for Hastelloy-XR (a modified version of the conventional Hastelloy alloy X) at, and /sup 0/C in simulated high-temperature gas-cooled reactor helium. Creep testing machines with special control of helium chemistry were used.

@article{osti_, title = {Evaluation of creep and relaxation data for hastelloy alloy x sheet}, author = {Booker, M K}, abstractNote = {Hastelloy alloy X has been a successful high-temperature structural material for more than two decades. Recently, Hastelloy alloy X sheet has been selected as a prime structural material for the proposed Brayton Isotope Power System (BIPS).

Tempering is often used on carbon steels, producing much the same results. The process, called "normalize and temper", is used frequently on steels such as carbon steel, or most other steels containing to % carbon.

These steels are usually tempered after normalizing, to increase the toughness and relieve internal stresses. Steel to which no alloy elements have been added is called “carbon steel.” Carbon steel is used where moderate strength is needed in a non-corrosive environment.

When other elements (chromium, molybdenum, nickel, vanadium, etc.) are added intentionally, it becomes an “alloy steel” — but it still contains carbon. Carbon and Alloy Steels • All of these steels are alloys of Fe and C – Plain carbon steels (less than 2% carbon and negligible amounts of other residual elements) • Low Carbon (less than % carbon) • Med Carbon (% to %) • High Carbon (% to %) – Low Alloy Steel – High Alloy Steel.

Carbon alloys are mainly composed of various types of carbon materials in multi-component systems. Here, atoms of each component have physical and/or chemical interactive relationships with other component atoms in the system.

The carbon atoms of the components may have different hybrid bonding orbitals to create different carbon components. Use our metal tube engineering glossary for a comprehensive list of tube terms.

An, V. Larionov, V. Monastyrski, E. Monastyrskaia, I. Grafas, J.M. Oh, O.D. Lim, S.H. Kim, J.H. Lee, D.Y. Seo --Freckle Formation in Superalloys / P.

Auburtin, S.L.y Cockcroft, A. Mitchell, T. Wang --Modelling of the Microsegregation in CMSX-4 Superalloy and its Homogenisation during Heat Treatment / M.S.A.

Karunaratne, D.C. Cox, P. With the careful control of these refractory elements, TCP phases occur after a long time service or a prolonged heat treatment. Some are believed to be the products of transformation from another beneficial phase: for example η(Ni 3 X) results from γ΄ [ 4 ] and σ has the same crystal structure as that of M 23 C 6, but without the carbon.The role of magnesium (Mg) in improving the high temperature mechanical properties of the superalloys, like creep, fatigue, tensile ductility, impact toughness etc.

have been vividly studied by several authors. On the other hand, very few authors have contradicted the view of any beneficial effect of Mg on the mechanical properties. This review presents a summary of the open literature related.Creep-resistant-steels are those providing useful properties even at elevated service temperatures.

Under such conditions, simple carbon steels cannot perform adequately. According to the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, normal carbon steels are suitable for service at temperatures not exceeding °C ( °F).