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Saturday, July 25, 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 LibraryOL15289390M

    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.


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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.