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Author : A. G. Imgram
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.3/5 (91 download)
Download or read book Strain Aging of Refractory Metals written by A. G. Imgram and published by . This book was released on 1960 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. Eliasz
Publisher :
ISBN 13 :
Total Pages : 111 pages
Book Rating : 4.:/5 (227 download)
Download or read book Strain Aging of Refractory Metals (tantalum). written by W. Eliasz and published by . This book was released on 1965 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strain aging effects in electron-beam refined tantalum have been studied using the yield point return and internal friction technique. The results have been discussed with reference to current theories of strain aging. A comparison of the data obtained by both techniques has been made which shows that the internal friction technique yields more direct information about the interstitial impurity responsible for the strain aging process. Electron-beam refined tantalum, when tested at room temperature, shows strain-aging effects, which become measurable at aging temperature greater than about 70 C. The activation energy of the strain-aging process has been found to be 26,000 + or - 1,000 cal/mol which is of the order of the activation energy for the diffusion of oxygen in tantalum (25,500 cal/mol). The magnitude of the strain-aging effects have been shown to be dependent on the concentration of oxygen, and this appears to be due to increased strength of pinning of dislocations with increasing oxygen content. The increase in the yield stress caused by strain-aging has been found to be no only due to the change in dislocation locking parameter, k sub y, but also to the increase in flow stress. It has been shown that in the temperature range studied (100 - 200 C) oxygen is responsible for the strain-aging effects. At higher temperatures nitrogen and/or carbon can contribute to strain-aging too. (Author).
Author : Peter L. Raffo
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (31 download)
Download or read book Dynamic Strain Aging During the Creep and Tensile Testing of a Molybdenum-titanium-carbon Alloy written by Peter L. Raffo and published by . This book was released on 1969 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was made of the influence of dynamic strain aging on the creep and short time tensile properties of a Mo-0.82 Ti-0.20 C (at. %) alloy. The strengthening effects are directly related to carbide precipitation during deformation. The precipitation lowers the density of mobile dislocations and slows down Ihe rate of recovery.
Author : Richard William Fountain
Publisher :
ISBN 13 :
Total Pages : 488 pages
Book Rating : 4.F/5 ( download)
Download or read book High Temperature Refractory Metals written by Richard William Fountain and published by . This book was released on 1966 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : K. D. SHEFFLER
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (227 download)
Download or read book Interactions Between Creep, Fatigue, and Strain-aging in Two Refractory Metal Alloys written by K. D. SHEFFLER and published by . This book was released on with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Walter D. Wilkinson
Publisher :
ISBN 13 :
Total Pages : 380 pages
Book Rating : 4.:/5 (42 download)
Download or read book Properties of Refractory Metals written by Walter D. Wilkinson and published by . This book was released on 1969 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Minerals, Metals and Materials Society. Fall Meeting
Publisher : Minerals, Metals, & Materials Society
ISBN 13 :
Total Pages : 338 pages
Book Rating : 4.:/5 (38 download)
Download or read book High Strain Rate Behavior of Refractory Metals and Alloys written by Minerals, Metals and Materials Society. Fall Meeting and published by Minerals, Metals, & Materials Society. This book was released on 1992 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: This aims to be the most complete volume available on the developing technology of refractory metals and alloys for high strain rate applications. Processing, testing and evaluation procedures for this group of specialized materials are thoroughly examined. Added emphasis is placed on high strain rate processing, dynamic compaction and forging, microstructure, texture, composition and loading rate effects on deformation and fracture.
Author : Robert Isaac Jaffee
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.3/5 (91 download)
Download or read book A Brief Review of Refractory Metals written by Robert Isaac Jaffee and published by . This book was released on 1959 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Albert G. Imgram
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Effect of Fabrication History and Microstructure on the Mechanical Properties of Refractory Metals and Alloys written by Albert G. Imgram and published by . This book was released on 1963 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the present knowledge concerning the relationship among fabrication history, metallurgical structure, and the mechanical properites of the refractory metals columbium, tantalum, bolybdenum, and tungsten, and their alloys. These are the refractory metals currently reveiveing the most attention for aerospace applications, and are therefore the materials considered in this survey. The report is organized into three main sections, titled ''Fabrication'', ''Microstructure and Alloying'', and ''Interstitial Impurities''. The data presented were selected as those which best illustrate the topics discussed. Descriptions of the metaljurgical principles involved are included. Suggestions for optimizing mechanical properties by controlling metallurgical structure are made where possible. (Author).
Author : George H. Keith
Publisher :
ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.3/5 (91 download)
Download or read book Some Strain-aging Effects in Electrorefined Vanadium written by George H. Keith and published by . This book was released on 1969 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert Isaac Jaffee
Publisher :
ISBN 13 :
Total Pages : 802 pages
Book Rating : 4.E/5 ( download)
Download or read book Refractory Metals and Alloys IV written by Robert Isaac Jaffee and published by . This book was released on 1969 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : F. R. Schwartzberg
Publisher :
ISBN 13 :
Total Pages : 86 pages
Book Rating : 4.3/5 (91 download)
Download or read book Ductile-brittle Transition in the Refractory Metals written by F. R. Schwartzberg and published by . This book was released on 1959 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Thomas Edwin Tietz
Publisher :
ISBN 13 :
Total Pages : 438 pages
Book Rating : 4.:/5 (41 download)
Download or read book Behavior and Properties of Refractory Metals written by Thomas Edwin Tietz and published by . This book was released on 1965 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Eric Alastair Bishop
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (27 download)
Download or read book The High Temperature Strength of the Refractory Metals written by Eric Alastair Bishop and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : asfahani;chen et al
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (118 download)
Download or read book High Strain Rate Behaviour of Refractory Metals & Alloys written by asfahani;chen et al and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : F. F. Schmidt
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Effects of Heat-treating and Testing Environments on the Properties of Refractory Metals written by F. F. Schmidt and published by . This book was released on 1964 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies on the effects of heat-treating and testing environments for the refractory metals have been limited primarily to the unalloyed metals and a few alloys of columbium and molybdenum. Most of this work has relied on compositional changes as a means of assesing the effects of various environments on these materials. It has been shown that all of these materials are subject to contamination or purification in various test environments. The residual gases H2, CO(or N2), and H20, constitute the major sources of contamination when testing columbium and tantalum materials in vacua. Under the same conditions, molybdenum and molybdenum alloys containing carbon and reactive-metal additions are subject to serious decarburization. Nonreactive gaseous atmospheres also cause serious changes in material chemistry, since small quantities of noxious gases are contained in the atmosphere. Several promising methods of circumventing material chemistry changes during various longtime, high-temperature exposures are being used and/or evaluated. (Author).
Author : Thomas E. Tietz
Publisher :
ISBN 13 :
Total Pages : 290 pages
Book Rating : 4.:/5 (115 download)
Download or read book Mechanical, Oxidation, and Thermal Property Data for Seven Refractory Metals and Their Alloys written by Thomas E. Tietz and published by . This book was released on 1961 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is a supplementary compilation on the mechanical properties and oxidation resistance of the refractory metals Cr, Co, Mo, Re, Ta, W, V, and their alloys. Tensile, creep, transition temperature, oxidation, thermal conductivity, and thermal expansion data are listed for these metals and their alloys. Recrystallization, stress rupture, strain rate and aging, grain growth and size, ductile-brittle behavior, and interstitial impurities data are also given.
