Simulation Study on Surface Drag Reduction Performance of Beryllium Copper Alloy by EDM

Abstract BERYLCO 25 is the standard high-performance beryllium copper alloy most widely used because of its high strength, hardness and excellent spring characteristics. BERYLCO 25 is the updated version of BERYLCO 25S (Alloy Digest Cu-3, November 1952). This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-271. Producer or source: Kawecki Berylco Industries Inc..

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CONDULOY

Alloy Digest ◽

10.31399/asm.ad.cu0011 ◽

1953 ◽

Vol 2 (10) ◽

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Physical Properties ◽

Tensile Properties ◽

Copper Alloy ◽

Heat Treating ◽

Age Hardening ◽

Beryllium Copper ◽

Hardening Heat Treatment

Abstract CONDULOY is a low beryllium-copper alloy containing about 1.5% nickel. It responds to age-hardening heat treatment for improved mechanical properties. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on casting, heat treating, machining, and joining. Filing Code: Cu-11. Producer or source: Brush Beryllium Company.

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BRUSH CASTING ALLOY 21C

Alloy Digest ◽

10.31399/asm.ad.cu0575 ◽

1992 ◽

Vol 41 (8) ◽

Keyword(s):

Physical Properties ◽

Tensile Properties ◽

Copper Alloy ◽

High Strength ◽

Heat Treating ◽

Casting Alloy ◽

Alloying Element ◽

Beryllium Copper

Abstract BRUSH CASTING ALLOY 21C is a beryllium copper alloy of high strength with cobalt as the second alloying element (1.0 to 2.0% Co). Use is in age-hardened temper. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on casting, heat treating, and machining. Filing Code: Cu-575. Producer or source: Brush Wellman Inc..

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BRUSH ALLOY M25

Alloy Digest ◽

10.31399/asm.ad.cu0217 ◽

1970 ◽

Vol 19 (6) ◽

Keyword(s):

Corrosion Resistance ◽

Physical Properties ◽

Tensile Properties ◽

Copper Alloy ◽

High Strength ◽

Heat Treating ◽

Age Hardening ◽

Beryllium Copper ◽

Screw Machine ◽

Electrical Components

Abstract BRUSH alloy M25 is a free-machining beryllium-copper alloy having good response to age-hardening for high strength, hardness, fatigue and corrosion resistance. It is recommended for screw machine products, gears, shafts, hardware, fasteners, connectors, electronic and electrical components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-217. Producer or source: Brush Beryllium Company.

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COPPER ALLOY No. C81400

Alloy Digest ◽

10.31399/asm.ad.cu0504 ◽

1985 ◽

Vol 34 (12) ◽

Keyword(s):

Physical Properties ◽

Tensile Properties ◽

Copper Alloy ◽

Health Hazard ◽

Heat Treating ◽

Class Ii ◽

Resistance Wire ◽

Beryllium Copper ◽

Trade Name ◽

Association Class

Abstract Copper Alloy No. C81400 is a precipitation-hardenable alloy of moderate hardness and strength. Its common name is beryllium-modified chromium copper and a previous trade name was Beryllium Copper 70C. Because of its beryllium content, its manufacture may present a health hazard. Typical uses comprise electrical parts that meet RWMA (Resistance Wire Manufacturer's Association) Class II standards. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on casting, heat treating, machining, and joining. Filing Code: Cu-504. Producer or source: Copper alloy foundries.

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Extremely low-outgassing material: 0.2% beryllium copper alloy

Journal of Vacuum Science & Technology A Vacuum Surfaces and Films ◽

10.1116/1.1635390 ◽

2004 ◽

Vol 22 (1) ◽

pp. 181-191 ◽

Cited By ~ 13

Author(s):

Fumio Watanabe

Keyword(s):

Copper Alloy ◽

Beryllium Copper

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Drag Reduction Study about Bird Feather Herringbone Riblets

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.461.201 ◽

2013 ◽

Vol 461 ◽

pp. 201-205 ◽

Cited By ~ 2

Author(s):

Hua Wei Chen ◽

Fu Gang Rao ◽

De Yuan Zhang ◽

Xiao Peng Shang

Keyword(s):

Drag Reduction ◽

Structural Parameters ◽

Reduction Rate ◽

Reduction Mechanism ◽

Surface Drag ◽

Flight Feather ◽

Hollow Shaft ◽

Smooth Edge ◽

Bird Feather ◽

Wild Goose

Flying bird has gradually formed airworthy structures e.g. streamlined shape and hollow shaft of feather to improve flying performance by millions of years natural selection. As typical property of flight feather, herringbone-type riblets can be observed along the shaft of each feather, which caused by perfect alignment of barbs. Why bird feather have such herringbone-type riblets has not been extensively discussed until now. In this paper, microstructures of secondary feathers are investigated through SEM photo of various birds involving adult pigeons, wild goose and magpie. Their structural parameters of herringbone riblets of secondary flight feather are statistically obtained. Based on quantitative analysis of feathers structure, one novel biomimetic herringbone riblets with narrow smooth edge are proposed to reduce surface drag. In comparison with traditional microgroove riblets and other drag reduction structures, the drag reduction rate of the proposed biomimetic herringbone riblets is experimentally clarified up to 15%, much higher than others. Moreover, the drag reduction mechanism of herringbone riblets are also confirmed and exploited by CFD.

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