Dispersed Hard Particle Strengthening of Metals PDF Download
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Author: Nicholas John Grant
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 42
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Author: Nicholas John Grant
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 42
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Book Description
Author: Rointan Framroze Bunshah
Publisher:
ISBN:
Category : Alloys
Languages : en
Pages : 276
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Book Description
Author: Facundo Rolf Morral
Publisher:
ISBN:
Category : Dispersion strengthening
Languages : en
Pages : 214
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Author: F. R. Morral
Publisher:
ISBN:
Category : Dispersion strengthening
Languages : en
Pages : 0
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Book Description
Nearly 70 years ago, the first dispersion -strengthened alloy was marketed commercially. This material, thoriated tungsten, has been of considerable industrial importance since then and new uses for the alloy are still being found. Much later, in the early 1950's, the marketing of sintered aluminum products (SAP)was started with great expectations that never materialized. This development, however, encouraged research and development in applying dispersion hardening to many metals and alloys, a number of which have been offered to industry. The main reason for interest is that these materials have markedly improved creep resistance over the original base metal and that this strength advantage can be maintained at very high temperatures, e.g., frequently up to 90 percent of the base metals' homologous melting temperature (0.9 Tm).Unfortunately, most of the dispersion -strengthened materials that have been marketed could not compete pricewise with other materials available. Joining problems have also inhibited their wider use. However, as the pressure for increasing service temperatures becomes greater, particularly in thermal shields and aircraft gas -turbine engines, the prospects of using dispersion -strengthened alloys to meet these needs becomes brighter. This would not be true without several important processing developments that have occurred within the past 10 years. These include mechanical alloying, directional recrystallization, and new concepts in thermomechanical processing. The net result should be a promising future for the most advanced of the dispersion -strengthened (DS) alloys. It is also probable that new uses will continue to be found for the important established, though less glamorous, DS alloys of tungsten, silver, and copper. This review consists of a brief assessment of the developments in dispersion strengthening of 21 metals and their alloys, with a special emphasis on the last 10 years.
Author: W. Arbiter
Publisher:
ISBN:
Category : Uranium
Languages : en
Pages : 40
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Author: Gilbert J. London
Publisher:
ISBN:
Category : Borides
Languages : en
Pages : 100
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Book Description
This report describes work on producing dispersion strengthened copper alloys using melting and casting techniques as opposed to more conventionally used powder metallurgy techniques. Two methods of approach are described. One method produces copper-thorium boride alloys by liquid phase precipitation. Cu-2% ThB4 alloys produced by this technique show 10 to 80% improved tensile properties, two-to-three orders of magnitude improved creep and stress-rupture properties together with a 2 to 10% increase in electrical resistivity. The second method produces a copper-aluminum oxide alloy by a solid state diffusion reaction following melting and casting. The precipitate formed is extremely fine, resisting recrystallization at 1000C for 24 hours. (Author).
Author: Shojiro Ochiai
Publisher: CRC Press
ISBN: 148229348X
Category : Science
Languages : en
Pages : 823
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Book Description
Provides coverage of dispersion-hardened and fibre-reinforced alloys, addressing principal mechanisms, processing and applications. Mechanical behaviour based on dislocation theory and elastic-plastic mechanics is dealt with and data on advanced composites are provided.
Author: Nicholas John Grant
Publisher:
ISBN:
Category : Alloys
Languages : en
Pages : 44
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Author: A. M. Freudenthal
Publisher: Elsevier
ISBN: 1483154947
Category : Technology & Engineering
Languages : en
Pages : 480
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Book Description
High Temperature Structures and Materials is a compilation of the proceedings of the Third Symposium on Naval Structural Mechanics held at Columbia University in New York on January 23-25, 1963. The symposium provided a forum for discussing structural mechanics under conditions of elevated temperatures. Emphasis is placed on the various aspects of structural design for elevated temperature service. The following areas are covered: material aspects of elevated temperature design; effects of high-speed environment; thermal stress analysis; and design criteria and reliability. This book is comprised of 13 chapters and begins by assessing the temperature dependence of elastic and anelastic properties in solids, followed by a discussion on the thermo-mechanical behavior of ceramics. Subsequent chapters explore the physical aspects of creep; thermal fatigue and its relation to creep rupture and mechanical fatigue; materials aspects of the re-entry problem; and problems of heat conduction and melting. Thermal stresses in viscoelastic solids are also considered, along with creep design and aspects of reliability under conditions of elevated temperature creep and fatigue. This monograph will be a valuable resource for material physicists and mechanical and structural designers concerned with the problem of elevated temperature effects on the performance and safety of modern structures.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 134
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