Research on Workable Refractory Alloys of Tungsten, Tantalum, Molybdenum, and Columbium PDF Download
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Author: CRUCIBLE STEEL CO OF AMERICA PITTSBURGH PA. Publisher: ISBN: Category : Languages : en Pages : 1
Book Description
Studies were made to determine the potential of the W- and Ta-rich alloys of the W-Ta-Mo-Nb system for high-strength structural applications at temperatures above 2500 F. Twenty specific compositions, including binary, ternary, nd quaternary alloys were investigated. Creep and tension tests were conducted on the as-extruded samples at 3000 F in vacuum. The high-temperature strength of the W-rich alloys increased with the addition of Nb, and the high-temperature strength of the Ta-rich alloys increased with additions of Mo and W. 88.6 W - 5.7 Mo - 5.7 Nb alloy had a tensile strength of 62,000 psi at 3000 F; several alloy had tensile strengths in excess of 50,000 psi. These strengths were attained by a combination of solid-solution strengthening and strain hardening. (Author).
Author: CRUCIBLE STEEL CO OF AMERICA PITTSBURGH PA. Publisher: ISBN: Category : Languages : en Pages : 1
Book Description
Studies were made to determine the potential of the W- and Ta-rich alloys of the W-Ta-Mo-Nb system for high-strength structural applications at temperatures above 2500 F. Twenty specific compositions, including binary, ternary, nd quaternary alloys were investigated. Creep and tension tests were conducted on the as-extruded samples at 3000 F in vacuum. The high-temperature strength of the W-rich alloys increased with the addition of Nb, and the high-temperature strength of the Ta-rich alloys increased with additions of Mo and W. 88.6 W - 5.7 Mo - 5.7 Nb alloy had a tensile strength of 62,000 psi at 3000 F; several alloy had tensile strengths in excess of 50,000 psi. These strengths were attained by a combination of solid-solution strengthening and strain hardening. (Author).
Author: F. H. Buttner Publisher: ISBN: Category : Heat resistant alloys Languages : en Pages : 18
Book Description
The memorandum discusses the supply, production, consumption, and applications of the refractory metals, columbium, tantalum, molybdenum, tungsten, and rhenium. Lists of manufacturers of mill products of these metals are included. (Author).
Author: H. E. Pattee Publisher: ISBN: Category : Brazing Languages : en Pages : 28
Book Description
Many of the important developments in the joining of columbium, molybdenum, tantalum, tungsten, and graphite are summarized. Much of the subject matter is devoted to the brazing processes, but diffusion and solid-state bonding are covered also. The particular properties which recommend the refractory metals and graphite to aerospace applications are discussed. Adverse properties which limit the use of these materials or which must be overcome by using special precautions also are mentioned. Typical filler metals used to join the refractory materials for low- as well as high-temperature service conditions are covered. The information was gathered from the current literature on joining and from the open DMIC files.
Author: North Atlantic Treaty Organization. Advisory Group for Aeronautical Research and Development Publisher: ISBN: Category : Confrences Languages : en Pages : 612
Author: F. F. Schmidt Publisher: ISBN: Category : Heat resistant alloys Languages : en Pages : 36
Book Description
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: Air Force Materials Laboratory (U.S.) Publisher: ISBN: Category : Materials Languages : en Pages : 294
Book Description
Technical reports published by the Air Force Materials Laboratoy during the period 1 July 1962 - 30 June 1963 are abstracted herein. Reports on reseqrch conducted by the Air Force Materials Laboratory personnel as well as that conducted on contract are included. These reports cover basic and applied research in the materials area being conducted by the Metals and Ceramics Division, Non-metallic Materials Division, Materials Physics Division, Manufacturing Technology Division, and Materials Applications Division of the Air Force Materials Laboratory.
Author: CRUCIBLE STEEL CO OF AMERICA PITTSBURGH PA.
Author: CRUCIBLE STEEL CO OF AMERICA PITTSBURGH PA.
Author: Crucible Steel Company of America. Central Research Laboratory
Author: Crucible Steel Company of America. Central Research Laboratory
Author: F. H. Buttner
Author: H. E. Pattee
Author: North Atlantic Treaty Organization. Advisory Group for Aeronautical Research and Development
Author: Robert Isaac Jaffee
Author: B. C. Allen
Author: F. F. Schmidt
Author: Air Force Materials Laboratory (U.S.)