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Author: Robert Melvin Evans
Publisher:
ISBN:
Category : Outer space
Languages : en
Pages : 26
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Book Description
In this memorandum, the available reports in DMIC which are concerned with welding of metal surfaces in space environments, whether this welding is desirable or undesirable, are reviewed. The phenomenon of surface welding in the space environment is of interest to many for various reasons. Some hope to use the phenomenon for the completion of attachment joints or repairs to spacecraft. Some are concerned because of the possible malfunction of moving components such as bearings, valves, and electrical contacts. However, no effort has been made to correlate and analyze the data that are presented. A section on fundamental studies also is included, along with an annotated bibliography which covers references dealing primarily with lubricants, lubrication, coatings, and test equipment.
Author: Robert Melvin Evans
Publisher:
ISBN:
Category : Outer space
Languages : en
Pages : 26
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Book Description
In this memorandum, the available reports in DMIC which are concerned with welding of metal surfaces in space environments, whether this welding is desirable or undesirable, are reviewed. The phenomenon of surface welding in the space environment is of interest to many for various reasons. Some hope to use the phenomenon for the completion of attachment joints or repairs to spacecraft. Some are concerned because of the possible malfunction of moving components such as bearings, valves, and electrical contacts. However, no effort has been made to correlate and analyze the data that are presented. A section on fundamental studies also is included, along with an annotated bibliography which covers references dealing primarily with lubricants, lubrication, coatings, and test equipment.
Author: Boris Evgenʹevich Paton
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 140
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Book Description
This is one of the first books describing in detail research and development work carried out in the former USSR and in the CIS countries in the area of welding in space. Information has been scattered throughout various journals and conference proceedings and this book presents a comprehensive picture of individual stages of development and construction of space stations. The authors describe in detail the work carried out at the E O Paton Electric Welding Institute (the main organisation working in this field).
Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1032
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Book Description
Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 434
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Book Description
Author: Robert Edward Monroe
Publisher:
ISBN:
Category : Adhesives
Languages : en
Pages : 86
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Book Description
This report supplies information on joining processes applicable to titanium and its alloys in sheet metal applications, primarily related directly to airframe construction. Although the material presented here does not cover all titanium joining processes, and omits such processes as plasma-arc, submerged-arc, electroslag, flash, and high-frequency resistance welding, the data presented cover materials up to 2-inches thick in some cases and the report should be useful to anyone seeking titanium joining information. The joining processes covered fall into five categories: welding, brazing, metallurgical bonding (diffusion and deformation bonding), adhesive bonding, and mechanical fastening. The fusion welding processes that are discussed in detail include gas tungsten arc, gas metal arc, arc spot, and electron beam. The resistance processes give extended coverage are spot, roll spot, and seam welding. (Author).
Author: Robert Melvin Evans
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 34
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Book Description
This memorandum describes the fusion-welding characteristics, mechanical properties, and stress-corrosion behavior of high-strength, weldable aluminum alloys. These are defined as alloys in which sound welds can be produced and in which at least 50 and 70 percent of the maximum base-metal strength can be retained in the as-welded and post-weld-treated conditions, respectively. Careful selection of joining method and filler metals as well as close control of joining-process parameters is necessary to produce high-strength aluminum weldments. Highest strengths and weld-joint efficiencies in high-strength weldable alloys are achieved with the use of postweld aging and/or mechanical treatments. The best combination of highest strengths and good welding characteristics is found in the 2000 and 7000 alloy series. As compared with the 2000 and 5000 alloy series, the 7000 alloy as a class suffer three major property disadvantages: (1) their tendency to be notch sensitive, (2) their tendency to exhibit low toughness at low temperatures, and (3) their much greater susceptibility to stress-corrosion cracking. Nonetheless, several relatively new 7000 series alloys have been developed which show reasonably good notch toughness to -423 F and which are considered competitive with the 2219 and 2014 alloys for cryogenic applications. (Author).
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 568
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Book Description
Author: Pei Moo Ku
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 348
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Book Description
Author: Esther Belin-Ferr
Publisher: World Scientific
ISBN: 9814322164
Category : Science
Languages : en
Pages : 468
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Book Description
This book will be the last one in a series of 4 books issued yearly as a deliverable of the research school established within the European Network of Excellence CMA (for Complex Metallic Alloys). It is written by reputed experts in the fields of metal physics, surface physics and chemistry, metallurgy and process engineering, combining expertise found inside as well as outside the network. The CMA network focuses on the huge group of largely unknown multinary alloys and compounds formed with crystal structures based on giant unit cells containing clusters, with many tens up to more than thousand atoms per unit cell. In these phases, for many phenomena, the physical length scales are substantially smaller than the unit-cell dimension. Hence, these materials offer unique combinations of properties, which are mutually excluded in conventional materials: metallic electric conductivity combined with low thermal conductivity, combination of good light absorption with high-temperature stability, combination of high metallic hardness with reduced wetting by liquids, electrical and thermal resistance tuneable by composition variation, excellent resistance to corrosion, reduced cold-welding and adhesion, enhanced hydrogen storage capacity and light absorption, etc. The series of books will concentrate on: development of fundamental knowledge with the aim of understanding materials phenomena, technologies associated with the production, transformation and processing of knowledge-based multifunctional materials, surface engineering, support for new materials development and new knowledge-based higher performance materials for macro-scale applications.
Author: Barrie D. Dunn
Publisher: Springer
ISBN: 3319233629
Category : Technology & Engineering
Languages : en
Pages : 677
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Book Description
The objective of this book is to assist scientists and engineers select the ideal material or manufacturing process for particular applications; these could cover a wide range of fields, from light-weight structures to electronic hardware. The book will help in problem solving as it also presents more than 100 case studies and failure investigations from the space sector that can, by analogy, be applied to other industries. Difficult-to-find material data is included for reference. The sciences of metallic (primarily) and organic materials presented throughout the book demonstrate how they can be applied as an integral part of spacecraft product assurance schemes, which involve quality, material and processes evaluations, and the selection of mechanical and component parts. In this successor edition, which has been revised and updated, engineering problems associated with critical spacecraft hardware and the space environment are highlighted by over 500 illustrations including micrographs and fractographs. Space hardware captured by astronauts and returned to Earth from long durations in space are examined. Information detailed in the Handbook is applicable to general terrestrial applications including consumer electronics as well as high reliability systems associated with aeronautics, medical equipment and ground transportation. This Handbook is also directed to those involved in maximizing the relia bility of new materials and processes for space technology and space engineering. It will be invaluable to engineers concerned with the construction of advanced structures or mechanical and electronic sub-systems.
