scholarly journals Effects of small addition of magnesium on initial aging rate of Al-Zn alloys

1972 ◽  
Vol 22 (4) ◽  
pp. 286-294 ◽  
Author(s):  
Hisashi SUZUKI ◽  
Motohiro KANNO ◽  
Kazuyoshi FUKUNAGA
Keyword(s):  
Small Addition ◽  
Aging Rate ◽  
Zn Alloys

Effect of Heat Treatments and Small Addition of Fe on the Occurrence of Serration in Al-Zn Alloys

2012 ◽  
Vol 706-709 ◽  
pp. 305-310
Author(s):  
Teruto Kanadani ◽  
Keiyu Nakagawa ◽  
Akira Sakakibara ◽  
Koji Murakami ◽  
Makoto Hino
Keyword(s):  
Binary Alloy ◽  
Room Temperature ◽  
Early Stage ◽  
Small Addition ◽  
Aging Rate ◽  
Aging Period ◽  
Treatment Conditions ◽  
Aging Conditions ◽  
Zn Alloys ◽  
Fe Addition

The effect of heat treatment conditions and small addition of Fe on occurrence of serration in Al-Zn alloys was investigated. Specimens were aged for various times up to 5Ms at 293K or 273K after quenching from various temperatures (TQ), 398K to 853K, and tensile-tested at room temperature. Serration occurred more easily according as TQbecame lower and the aging time became shorter: in the case that TQ=473K serration was observed even after aging for 2.6Ms, while in the case that TQ=773K serration did not occur irrespective of aging conditions. Serration was also recognized when the specimens were furnace-cooled from 773K to room temperature. Thus, for the binary alloy serration was observed only when the aging period was short enough, but addition of Fe to the binary alloy prolonged the aging period where serration could be recognized. Aging rate measured by hardness was remarkably retarded with the increase of Fe addition. These results together with those obtained by the electrical resistometry suggest that the serration in Al-Zn alloys occurs in the early stage of aging where small GP zones or solute clusters are formed.

Effect of Heat Treatment Conditions and Small Addition of Cu on Occurrence of Serration in Al-Si Alloys

2014 ◽  
Vol 783-786 ◽  
pp. 180-185
Author(s):  
Teruto Kanadani ◽  
Norihito Nagata ◽  
Keiyu Nakagawa ◽  
Koji Murakami ◽  
Makoto Hino
Keyword(s):  
Heat Treatment ◽  
Binary Alloy ◽  
Room Temperature ◽  
Small Addition ◽  
The Other ◽  
Aging Rate ◽  
Aging Period ◽  
Treatment Conditions ◽  
Heat Treated ◽  
Aging Conditions

In this study, the effect of heat treatment conditions and small addition of Cu on occurrence of serration in Al-Si alloys was investigated. Specimens were aged for various times up to 87ks at 273K or 473K after quenching from 853K, and tensile-tested at room temperature. In the binary alloy, serration was observed even after aging for 87ks at 273K, while in the case of aging at 473K, serration did not occur under aging conditions at aging time, tA≧20s. On the other hand, serration was observed even after aging for 72ks at 473K in the Cu-added alloy. In both alloys, serration was also recognized when the specimens were furnace-cooled from 853K to room temperature. Thus, for aging at 473K of the binary alloy serration was observed only when the aging period was short enough, but addition of Cu to the binary alloy prolonged the aging period where serration could be recognized. Aging rate of both alloys measured by tensile strength was almost the same. The size of precipitates in the Cu-added alloy was smaller than that in binary alloy. Moreover, the number of the precipitates at the grain boundary in the Cu-added alloy was smaller than that in the binary alloy. It is considered that serration occurs for Al-Si alloys when the specimen is heat-treated so that small precipitates may be formed. Now the details of the effect of Cu addition are not clear.

scholarly journals Effect of a small addition of Si on age-hardening and fatigue strength in Al-Zn alloys.

1997 ◽  
Vol 47 (12) ◽  
pp. 698-699
Author(s):  
Teruto KANADANI ◽  
Norio HOSOKAWA ◽  
Tadashi TANIMOTO ◽  
Akira SAKAKIBARA ◽  
Norihide NISHIDA
Keyword(s):  
Fatigue Strength ◽  
Small Addition ◽  
Age Hardening ◽  
Zn Alloys

COPPER ALLOY No. 411

Alloy Digest ◽  
1975 ◽  
Vol 24 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
Heat Treating ◽  
Small Addition

Abstract Copper Alloy No. 411 is brass with a small addition of tin. It has good formability, weldability and corrosion resistance and is recommended for such applications as bearings, bushings, jewelry and stamped hardware. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-296. Producer or source: Brass mills.

COPPER ALLOY No. C44400 and C44500

Alloy Digest ◽  
1994 ◽  
Vol 43 (11) ◽  
Keyword(s):  
Fracture Toughness ◽  
Copper Alloy ◽  
Heat Treating ◽  
Small Addition ◽  
Good Combination ◽  
General Corrosion ◽  
Good Resistance ◽  
Tin Alloys ◽  
Copper Zinc ◽  
Strength And Ductility

Abstract COPPER ALLOY NOS. C44400 and C44500 are copper-zinc-tin alloys inhibited by antimony and phosphorus, respectively. They are commonly known as inhibited admiralty metal or admiralty brass. They have a good combination of strength and ductility and good resistance to general corrosion. The small addition of inhibitor is made to minimize the alloy’s susceptibility to dezincification and stress corrosion. They are used for condenser, evaporator and heat-exchanger tubes and associated applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: CU-599. Producer or source: Copper and copper alloy mills.

COPPER ALLOY No. C40500

Alloy Digest ◽  
1984 ◽  
Vol 33 (3) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
Heat Treating ◽  
Small Addition ◽  
Good Resistance

Abstract Copper Alloy No. C40500 is brass containing a small addition of tin. It has moderate strength and good ductlity. Common fabrication processes are blanking, forming and drawing. It can be machined and joined successfully. It has good resistance to corrosion. Among its many uses are terminals, meter clips, contact springs and washers. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-473. Producer or source: Brass mills.

MUELLER ALLOY 4430

Alloy Digest ◽  
1985 ◽  
Vol 34 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Heat Exchanger ◽  
Physical Properties ◽  
Stress Corrosion ◽  
Heat Treating ◽  
Small Addition ◽  
Good Combination ◽  
Good Resistance ◽  
Copper Zinc ◽  
Strength And Ductility

Abstract MUELLER Alloy 4430 is a copper-zinc-tin alloy. It contains a small addition (nominally 0.06%) of arsenic as inhibiting element to protect the alloy against stress corrosion. It is commonly known as Admiralty Metal. It has a good combination of strength and ductility and good resistance to corrosion. It is used widely for condenser, evaporator and heat-exchanger tubes and associated applications. 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-497. Producer or source: Mueller Brass Company.

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