Tungsten Refractory Metals And Alloys 4 1998
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Tungsten Refractory Metals And Alloys 4 1998
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Author : Animesh Bose
language : en
Publisher:
Release Date : 1998
Tungsten Refractory Metals And Alloys 4 1998 written by Animesh Bose and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Science categories.
Directed Light Fabrication Of Refractory Metals And Alloys
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Author :
language : en
Publisher:
Release Date : 2006
Directed Light Fabrication Of Refractory Metals And Alloys written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
This report covers deposition of refractory pure metals and alloys using the Directed Light Fabrication (DLF) process and represents progress in depositing these materials through September 1998. In extending the DLF process technology to refractory metals for producing fully dense, structurally sound deposits, several problems have become evident. (1) Control of porosity in DLF-deposited refractory metal is difficult because of gases, apparently present in commercially purchased refractory metal powder starting materials. (2) The radiant heat from the molten pool during deposition melts the DLF powder feed nozzle. (3) The high reflectivity of molten refractory metals, at the Nd-YAG laser wavelength (1.06[micro]m), produces damaging back reflections to the optical train and fiber optic delivery system that can terminate DLF processing. (4) The current limits on the maximum available laser power to prevent back reflection damage limit the parameter range available for densification of refractory metals. The work to date concentrated on niobium, W-25Re, and spherodized tungsten. Niobium samples, made from hydride-dehydride powder, had minimal gas porosity and the deposition parameters were optimized; however, test plates were not made at this time. W-25Re samples, containing sodium and potassium from a precipitation process, were made and porosity was a problem for all samples although minimized with some process parameters. Deposits made from potassium reduced tungsten that was plasma spherodized were made with minimized porosity. Results of this work indicate that further gas analysis of starting powders and de-gassing of starting powders and/or gas removal during deposition of refractory metals is required.
Tungsten And Refractory Metals 1994
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Author : Animesh Bose
language : en
Publisher:
Release Date : 1995
Tungsten And Refractory Metals 1994 written by Animesh Bose and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Science categories.
The papers presented at this meeting examined the processing, applications, microstructure, quasi-static and dynamic properties, and ballistic performance of this unique class of materials.
Thermochemical Deposition Of Refractory Metals Alloys And Compounds For Application
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Author :
language : en
Publisher:
Release Date : 1965
Thermochemical Deposition Of Refractory Metals Alloys And Compounds For Application written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with categories.
Tungsten Hard Metals And Refractory Alloys 5 2000
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Author : Mark S. Greenfield
language : en
Publisher:
Release Date : 2000
Tungsten Hard Metals And Refractory Alloys 5 2000 written by Mark S. Greenfield and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Science categories.
Refractory Metals And Alloys Iv
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Author : Robert Isaac Jaffee
language : en
Publisher:
Release Date : 1969
Refractory Metals And Alloys Iv written by Robert Isaac Jaffee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Technology & Engineering categories.
Properties Of Coated Refractory Metals
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Author : W. A. Gibeaut
language : en
Publisher:
Release Date : 1964
Properties Of Coated Refractory Metals written by W. A. Gibeaut and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Heat resistant alloys categories.
This report summarizes the information generated since the middle of 1961 on the chemical, physical, and mechanical properties of refractory metals that are coated with oxidation-resistant coatings of advanced-experimental or commercial status. It is a supplement to DMIC Report 162, Coatings for the Protection of Refractory Metals from Oxidation, dated November 24, 1961. Recent data on specific silicide- and aluminide- type coatings for columbium, molybdenum, tantalum, and tungsten and their alloys reflect general advances in coating quality and performance, understanding of the behavior of coated systems, and more complete realization of the problems associated with the use of coated hardware.
Refractory Metal Alloys Metallurgy And Technology
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Author : I. Machlin
language : en
Publisher: Springer
Release Date : 2012-06-02
Refractory Metal Alloys Metallurgy And Technology written by I. Machlin and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-06-02 with Technology & Engineering categories.
This publication documents Proceedings of the Symposium on Metal lurgy and Technology of Refractory Metal Alloys, held in Washington, D.C. at the Washington Hilton Hotel on April 25-26, 1968, under sponsorship of the Refractory Metals Committee, Institute of Metals Division, of the Metallurgical Society of AIME, and the National Aeronautics and Space Administration. The Symposium presented critical reviews of selected topics in refractory metal alloys, thereby contributing to an in-depth understanding of the state-of-the-art, and establishing a base line for further research, development, and application. This Symposium is fifth in a series of conferences on refractory metals, sponsored by the Metallurgical Society of AlME. Publications issuing from the conferences are valuable technical and historical source books, tracing the evolution of refractory metals from early laboratory alloying studies to their present status as useful engineering materials. Refractory metals are arbitrarily defined by melting point. A 0 melting temperature of over 3500 F was selected as the minimum for this Symposium, thus excluding chromium and vanadium, which logically could be treated with other refractory metals in Groups VA and VIA of the periodic table. The Refractory Metals Committee is planning reviews of chromium and vanadium in subsequent conferences.
Refractory Metal Alloys
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Author : I. Machlin
language : en
Publisher:
Release Date : 1968
Refractory Metal Alloys written by I. Machlin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Refractory materials categories.
Evolution Of Refractory Metals And Alloys
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Author : Edward N. C. Dalder
language : en
Publisher: Minerals, Metals, & Materials Society
Release Date : 1994
Evolution Of Refractory Metals And Alloys written by Edward N. C. Dalder and has been published by Minerals, Metals, & Materials Society this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Technology & Engineering categories.
This collection of papers is from the 1993 TMS annual Meeting held in Denver, Colorado, February 21-25, 1993. It provides a review of the development of refractory metal alloys (those based on vanadium, columbian, niobium, tantalum, molybdenum, tungsten and rhenium) from the 1950s to the present. The technology of many of the leading researchers in this area has been recorded and preserved as a reference for current and future researchers.