Creep Of Columbium Alloys

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Creep of Columbium Alloys

Author : E. S. Bartlett
Publisher :
ISBN 13 :
Total Pages : 102 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Creep of Columbium Alloys by : E. S. Bartlett

Download or read book Creep of Columbium Alloys written by E. S. Bartlett and published by . This book was released on 1963 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although much information on high-temperature tensile and stress-rupture properties for various columbium-base materials is readily available, only limited information concerning the more useful creep behavior of columbium alloys has been reported. These data are widely scattered throughout the literature, and little attempt has been made to rationalize the creep behavior of columbium alloys. The purpose of this memorandum is to compile and review existing creep data for columbium alloys to gain insight into their merits and limitations for time-dependent structural service. (Author).

Recent Information on Long-time Creep Data for Columbium Alloys

Author : J. J. English
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Recent Information on Long-time Creep Data for Columbium Alloys by : J. J. English

Download or read book Recent Information on Long-time Creep Data for Columbium Alloys written by J. J. English and published by . This book was released on 1965 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ultrahigh-vacuum Creep Behavior of Columbium and Tantalum Alloys at 2000 ̊and 2200 ̊F for Times Greater Than 1000 Hours

Author : Robert H. Titran
Publisher :
ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Ultrahigh-vacuum Creep Behavior of Columbium and Tantalum Alloys at 2000 ̊and 2200 ̊F for Times Greater Than 1000 Hours by : Robert H. Titran

Download or read book Ultrahigh-vacuum Creep Behavior of Columbium and Tantalum Alloys at 2000 ̊and 2200 ̊F for Times Greater Than 1000 Hours written by Robert H. Titran and published by . This book was released on 1966 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Short-Time Creep of Columbium and Tantalum Alloys at 2600 to 3200°F

Author : RA. Perkins
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Short-Time Creep of Columbium and Tantalum Alloys at 2600 to 3200°F by : RA. Perkins

Download or read book Short-Time Creep of Columbium and Tantalum Alloys at 2600 to 3200°F written by RA. Perkins and published by . This book was released on 1974 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uncoated Ta-17W and C129Y alloys and coated Ta-10W, C103, and C129Y alloys have been evaluated for short-time creep behavior at 2600 to 3200°F. The time for creep strains of up to 2 percent has been measured and the results have been used to derive empirical equations that predict short-time creep life in this temperature range. The equations give estimates of the time-to-creep strains of up to 2 percent at stress levels that will produce the maximum strain in 60 min or less. Silicide-base coatings appear to add to the creep strength of coated Ta-10W but have little added effect on the strength of the columbium-base alloys. The creep behavior of coated metals can be analyzed by the same empirical methods as those used for uncoated substrates. The results show that commercially available silicide coatings protect the substrate from oxidation with creep strains of up to 2 percent on exposures of 1 to 11⁄2 h in this temperature range.

Statistical Analysis of High-temperature Creep-rate Data for Alloys of Tantalum, Molybdenum, and Columbium

Author : William L. Maag
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Statistical Analysis of High-temperature Creep-rate Data for Alloys of Tantalum, Molybdenum, and Columbium by : William L. Maag

Download or read book Statistical Analysis of High-temperature Creep-rate Data for Alloys of Tantalum, Molybdenum, and Columbium written by William L. Maag and published by . This book was released on 1969 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Engineering Properties of Columbium and Columbium Alloys

Author : F. F. Schmidt
Publisher :
ISBN 13 :
Total Pages : 274 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis The Engineering Properties of Columbium and Columbium Alloys by : F. F. Schmidt

Download or read book The Engineering Properties of Columbium and Columbium Alloys written by F. F. Schmidt and published by . This book was released on 1963 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a state-of-the-art survey covering niobium and 18 of its most promising alloys are presented. All data are given in tabular and graphical form covering some of the more important physical, mechanical, and metallurgical properties for each material. References are given at the conclusion of each material section.

Elevated-temperature Creep and Tensile Properties of Three Columbium-base Alloys

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Elevated-temperature Creep and Tensile Properties of Three Columbium-base Alloys by :

Download or read book Elevated-temperature Creep and Tensile Properties of Three Columbium-base Alloys written by and published by . This book was released on 1962 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In work to develop materials for elevated temperature applications, binary niobium alloys containing either 2.37 wt% chromium, 3.34 wt% zirconium, or 5.21 wt% vanadium were fabricated to sheet by forging at 550 deg C and rolling at room temperature. All three alloys were completely recrystallized after 90% cold work (reduction in thickness) and a one hour anneal at 1150 deg C. Tensile tests on the annealed materials at 650, 800, 1000, 1150, and 1315 deg C indicated that chromium, zirconium, and vanadium are potent strengtheners of niobium. At 1000 deg C the 2.37 wt% chromium and the 5.21 wt% vanadium alloys had 0.2% offset yield strengths of 38,000 and 38,300 psi respectively. At 1315 deg C, the 3.34 wt% zirconium alloy had a 0.2% offset yield strength of 14,700 psi. Stresses to produce creep rates of 0.0001, 0.01, and 0.1% per hour were determined for all three alloys at 650, 800, and 1000 deg C. The vanadium alloy exhibited the greatest creep resistance, requiring stresses of 52,700, 40,000, and 15,500 psi to produce a creep rate of 0.001% per hour at 650, 800, and 1000 deg C respectively. This research indicated that significant improvement in the mechanical properties of niobium can be achieved by alloying without undue sacrifice of fabricability. (auth).

High-temperature Creep Behavior of a Columbium Alloy, FS-85

Author : Robert H. Titran
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis High-temperature Creep Behavior of a Columbium Alloy, FS-85 by : Robert H. Titran

Download or read book High-temperature Creep Behavior of a Columbium Alloy, FS-85 written by Robert H. Titran and published by . This book was released on 1965 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Creep tests of 1000 hours duration and greater were conducted in the temperature range 20000 to 22000 F on a commercially available columbium alloy (FS-85) in vacuum units designed and built to achieve ultimate pressures of 10%% torr. At a stress level of 10 000 pounds per square inch, FS-85 exhibited moderate creep resistance at 2000 F, 1-percent strain being achieved in 775 hours. At 21000 and 22000 F and the same stress level, the alloy was much weaker, 1-percent strain being achieved in 355 and 50 hours, respectively. The Manson-Haferd linear time-temperature parameter proved moderately successful in predicting the long-time creep lives from relatively short-time creep data, the maximum error between predicted and experimental lives being a factor of 1. 7 and the average error being a factor of 1. 3. The agreement is considered good in view of the large scatter generally observed in long-time high-temperature creep tests. In all cases, however, the observed experimental life was shorter than the predicted life. The nonconservative nature of these predictions may be due in part to the fact that the predictions were based on data obtained at a pressure level of approximately to 10 -6 torr, but the long-time tests to which the predictions are compared were made at a lower pressure level, 10 -8 to 10 -9 torr. Creep tests conducted in the conventional-vacuum units (10 -6 torr) and the ultrahigh- vacuum units under the same conditions of temperature and stress yielded creep curves that are virtually identical for the first few hundred hours but that deviate with increasing test time. The conventional-vacuum tests then showed a reduced creep rate compared with that of the ultrahigh-vacuum tests.

Physical and Mechanical Properties of Columbium and Columbium-base Alloys

Author : E. S. Bartlett
Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Physical and Mechanical Properties of Columbium and Columbium-base Alloys by : E. S. Bartlett

Download or read book Physical and Mechanical Properties of Columbium and Columbium-base Alloys written by E. S. Bartlett and published by . This book was released on 1960 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

כתבי דוד שמעונוביץ

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (232 download)

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Book Synopsis כתבי דוד שמעונוביץ by :

Download or read book כתבי דוד שמעונוביץ written by and published by . This book was released on 1948 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Columbium Metallurgy

Author : American Institute of Mining, Metallurgical, and Petroleum Engineers. Hudson-Mohawk Section
Publisher :
ISBN 13 :
Total Pages : 768 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Columbium Metallurgy by : American Institute of Mining, Metallurgical, and Petroleum Engineers. Hudson-Mohawk Section

Download or read book Columbium Metallurgy written by American Institute of Mining, Metallurgical, and Petroleum Engineers. Hudson-Mohawk Section and published by . This book was released on 1961 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Analyses of Minnesota Incomes

Author : Roy Gillispie Blakey
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (6 download)

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Book Synopsis Analyses of Minnesota Incomes by : Roy Gillispie Blakey

Download or read book Analyses of Minnesota Incomes written by Roy Gillispie Blakey and published by . This book was released on 1944 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ultrahigh-vacuum Creep Behavior of Columbium and Tantalum Alloys at 2000° and 2200° F for Times Greater Than 1000 Hours

Author : Robert H. Titran
Publisher :
ISBN 13 :
Total Pages : 25 pages
Book Rating : 4.:/5 (249 download)

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Book Synopsis Ultrahigh-vacuum Creep Behavior of Columbium and Tantalum Alloys at 2000° and 2200° F for Times Greater Than 1000 Hours by : Robert H. Titran

Download or read book Ultrahigh-vacuum Creep Behavior of Columbium and Tantalum Alloys at 2000° and 2200° F for Times Greater Than 1000 Hours written by Robert H. Titran and published by . This book was released on 1966 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Development of Columbium Alloy WC3015

Author : A. A. Tavassoli
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Development of Columbium Alloy WC3015 by : A. A. Tavassoli

Download or read book Development of Columbium Alloy WC3015 written by A. A. Tavassoli and published by . This book was released on 1971 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Investigation of the Effects of Thermal Mechanical Variables on the Creep Properties of High Strength Columbium Alloys

Author : J. A. Cornie
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Investigation of the Effects of Thermal Mechanical Variables on the Creep Properties of High Strength Columbium Alloys by : J. A. Cornie

Download or read book Investigation of the Effects of Thermal Mechanical Variables on the Creep Properties of High Strength Columbium Alloys written by J. A. Cornie and published by . This book was released on 1969 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ultrahigh-vacuum Creep Behavior of Columbium and Tantalum Alloys at 2000 Degrees and 2200 Degrees F for Times Greater Than 1000 Hours

Author : Robert H. Titran
Publisher :
ISBN 13 :
Total Pages : 25 pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Ultrahigh-vacuum Creep Behavior of Columbium and Tantalum Alloys at 2000 Degrees and 2200 Degrees F for Times Greater Than 1000 Hours by : Robert H. Titran

Download or read book Ultrahigh-vacuum Creep Behavior of Columbium and Tantalum Alloys at 2000 Degrees and 2200 Degrees F for Times Greater Than 1000 Hours written by Robert H. Titran and published by . This book was released on 1966 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Elevated Temperature Ductility Minima and Creep Strengthening of Coated and Uncoated Columbium Alloys

Author : B. C. Allen
Publisher :
ISBN 13 :
Total Pages : 73 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Elevated Temperature Ductility Minima and Creep Strengthening of Coated and Uncoated Columbium Alloys by : B. C. Allen

Download or read book Elevated Temperature Ductility Minima and Creep Strengthening of Coated and Uncoated Columbium Alloys written by B. C. Allen and published by . This book was released on 1967 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Phase 1 an investigation was made of factors affecting the tensile ductility minimum behavior of coated columbium alloys in air in the intermediate temperature range 700-1100 C. In the case of TRW Cr-Ti-Si coated Cb-10W and Cb-10W-2.5Zr(Cb-752 Alloy), contamination and embrittlement by air at the base of coating cracks is the major factor responsible for loss of ductility. Apparent mechanical interaction between coating and substrate palys a smaller role, but becomes more important with decreasing substrate thickness. The presence of zirconium and dynamic strengthening of the substrate have relatively little effect on ductility. A study of dynamic strengthening during creep of Cb-10W-2.5Zr and Cb-10W was the objective of Phase 2. All creep testing was done in a vacuum of 10 to the minus 6th power torr and under constant stress conditions. The temperature range of interest was 800-1200 C. In long-time creep tests, the usual dynamic strengthening process in the Cb-10W-2.5Zr alloy was complicated by additional hardening due to internal oxidation. The Cb-10W-2.5Zr alloy was considerably stronger in creep than Cb-10W. The possible strengthening effects of Zr are discussed. (Author).