Conditions Causing Intergranular Cracking in High Strength Nickel-Copper Alloys

2009 ◽  
pp. 384-384-9
Author(s):  
ME Natishan ◽  
M Wagenhofer
Keyword(s):  
Copper Alloys ◽  
High Strength ◽  
Intergranular Cracking ◽  
Nickel Copper

NICKEL COPPER ALLOYS 505 and 506

Alloy Digest ◽  
1975 ◽  
Vol 24 (2) ◽  
Keyword(s):  
Wear Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Copper Alloys ◽  
High Strength ◽  
Heat Treating ◽  
Corrosion And Wear ◽  
Alloy Casting ◽  
Resistance Alloy ◽  
Nickel Copper

Abstract Nickel-Copper Alloys 505 and 506 are strong castings alloys. Both alloys combine high strength with good wear resistance. Alloy 505 (4% silicon) is employed where exceptional resistance to galling is needed. Alloy 506 (3% silicon) is recommended where good (but not exceptional) galling resistance is sufficient. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion and wear resistance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: Ni-215. Producer or source: Nickel alloy casting producers.

scholarly journals Strengthening Mechanisms in Nickel-Copper Alloys: A Review

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1358
Author(s):  
Olexandra Marenych ◽  
Andrii Kostryzhev
Keyword(s):  
Heat Treatment ◽  
Copper Alloys ◽  
High Strength ◽  
Wire Drawing ◽  
Strengthening Mechanisms ◽  
Processing Technologies ◽  
Cu Alloys ◽  
Excellent Corrosion Resistance ◽  
Nickel Copper ◽  
Marine Vessels

Nickel-Copper (Ni-Cu) alloys exhibit simultaneously high strength and toughness, excellent corrosion resistance, and may show good wear resistance. Therefore, they are widely used in the chemical, oil, and marine industries for manufacturing of various components of equipment, such as: drill collars, pumps, valves, impellers, fixtures, pipes, and, particularly, propeller shafts of marine vessels. Processing technology includes bar forging, plate and tube rolling, wire drawing followed by heat treatment (for certain alloy compositions). Growing demand for properties improvement at a reduced cost initiate developments of new alloy chemistries and processing technologies, which require a revision of the microstructure-properties relationship. This work is dedicate to analysis of publicly available data for the microstructure, mechanical properties and strengthening mechanisms in Ni-Cu alloys. The effects of composition (Ti, Al, Mn, Cr, Mo, Co contents) and heat treatment on grain refinement, solid solution, precipitation strengthening, and work hardening are discussed.

JESSOP JS17Cr-4Ni

Alloy Digest ◽  
1982 ◽  
Vol 31 (7) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Food Processing ◽  
Precipitation Hardening ◽  
High Strength ◽  
Heat Treating ◽  
Steel Company ◽  
Lower Strength ◽  
Nickel Copper ◽  
Short Time

Abstract JESSOP JS17Cr-4Ni is a martensitic, precipitation-hardening chromium-nickel-copper stainless steel. It provides an excellent combination of high strength and hardness, short-time low-temperature precipitation hardening and good mechanical properties at temperatures up to 600 F (316 C). Its corrosion resistance is quite good but inferior to lower strength grades produced for corrosion-resistance applications. JS17Cr-4Ni is used widely for critical applications in the aerospace, chemical, food processing and other industries. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-412. Producer or source: Jessop Steel Company.

Overlapping energy bands and the theory of collective electron ferromagnetism

1953 ◽  
Vol 49 (1) ◽  
pp. 115-129 ◽  
Author(s):  
A. B. Lidiard
Keyword(s):  
Curie Point ◽  
Energy Band ◽  
Spontaneous Magnetization ◽  
Copper Alloys ◽  
Implicit Assumption ◽  
Energy Bands ◽  
Unknown Parameters ◽  
Nickel Copper ◽  
Predicted Values ◽  
A Minor

ABSTRACTThe theory of collective electron ferromagnetism given by Stoner applies to a system of electrons in a single energy band; for iron, cobalt and nickel this is identified with the band of states derived from atomic 3d functions. To bring in the generally assumed overlapping of the 3d band by the wide 4s band in these metals, the theory has been extended to take account of the transfer of electrons from 3d to 4s states with change of temperature. A previous calculation of this transfer effect must be regarded as inadequate, for the part played by the exchange energy in determining the distribution of electrons between the two sets of states was omitted. The general equations are derived in § 2 and used as a basis for discussion of the properties of nickel-copper alloys at absolute zero in § 3. In §§4 and 5 numerical results are presented which show the effect of the overlapping 4s band on the magnetic properties of a system such as nickel both above and below its Curie point. Comparison with the measured paramagnetic susceptibility of pure nickel above the Curie point strongly suggests that for this metal the overlapping 4s band has only a minor influence, although in principle the effect could be very large (cf. Fig. 4). This result is not unambiguous, however, because values thus inferred for the two unknown parameters lead to inaccurate predictions below the Curie point. First, the predicted values for the spontaneous magnetization are too small. Secondly, the theory demands that the nickel-copper alloys should only be ferromagnetic below a copper content of about 20 %, whereas experimentally the limit is known to be about 60 %. In conclusion, it is suggested that the implicit assumption of Stoner's theory that the exchange integrals between all pairs of 3d states are equal to one another is a more serious restriction on the theory than the consideration of only a single energy band.

The repassivation of nickel-copper alloys in sulphuric acid

1984 ◽  
Vol 24 (4) ◽  
pp. 305-323 ◽  
Author(s):  
R.D.K. Misra ◽  
G.T. Burstein
Keyword(s):  
Sulphuric Acid ◽  
Copper Alloys ◽  
Nickel Copper
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