Grain Size‐Internal Stress Relationship in Iron‐Nickel Alloy Electrodeposits

1996 ◽  
Vol 143 (10) ◽  
pp. 3327-3332 ◽  
Author(s):  
F. Czerwinski
Keyword(s):  
Grain Size ◽  
Internal Stress ◽  
Nickel Alloy ◽  
Iron Nickel

Electroforming and Mechanical Properties of Iron-Nickel Alloy Foil

1979 ◽  
Vol 21 (6) ◽  
pp. 411-417 ◽  
Author(s):  
S. H. F. Lai ◽  
J. A. McGeough
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Hydrogen Embrittlement ◽  
Nickel Alloy ◽  
Current Density ◽  
Nickel Chloride ◽  
Iron Foil ◽  
Alloy Foil ◽  
Iron Nickel ◽  
Current Densities

A method of electroforming smooth, bright, iron-nickel alloy foil, of thickness about 0.1 mm, is developed. The electrolyte, mainly a solution of ferrous chloride and nickel chloride, is operated at a temperature of 95 °C, and at current densities of between 5 and 20 A/dm2. Below that temperature, and at current densities greater than 20 A/dm2, the foil becomes cracked. The amount of nickel co-deposited in the alloy can be increased up to a limit of 6.24 per cent, by reducing the current density and/or increasing the concentration of nickel chloride in the electrolyte. As the nickel content of the foil rises, the material suffers increasingly from hydrogen embrittlement. The main mechanical properties of the alloy foil are more affected by hydrogen embrittlement, the amount of which is influenced by current density and the concentration of nickel chloride, than by changes in grain size. This behaviour is in contrast with that of electroformed iron foil, for which the mechanical properties are largely controlled by the influence of the current density and electrolyte temperature upon its grain size. However, when the other process conditions are held constant, the mechanical properties of the alloy foil behave like the iron foil in decreasing with increasing foil thickness, owing to increases in average grain size.

ISO-ELASTIC

Alloy Digest ◽  
1957 ◽  
Vol 6 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Temperature Coefficient ◽  
Nickel Alloy ◽  
Modulus Of Elasticity ◽  
Heat Treating ◽  
Precision Instrument ◽  
Iron Nickel

Abstract ISO-ELASTIC is an iron-nickel alloy having low temperature coefficient of the modulus of elasticity. It is suitable for precision instrument springs. 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, and machining. Filing Code: Fe-14. Producer or source: John Chatillon & Sons.

NCF 3015 ALLOY

Alloy Digest ◽  
1999 ◽  
Vol 48 (10) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Nickel Alloy ◽  
Heat Treating ◽  
Engine Valve ◽  
Good Strength ◽  
Iron Nickel

Abstract NCF 3015 alloy is an iron nickel alloy that is precipitation hardened and has good strength and corrosion resistance to 760 C (1400 F). It is commonly used for engine valve applications. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on forming, heat treating, and machining. Filing Code: SS-765. Producer or source: Carpenter.

Precision Laser Welding of Silica Glass with Iron-Nickel Alloy

2021 ◽  
Author(s):  
T. O. Lipat’eva ◽  
S. S. Fedotov ◽  
A. S. Lipat’ev ◽  
S. V. Lotarev ◽  
G. Yu. Shakhgil’dyan ◽  
...  
Keyword(s):  
Laser Welding ◽  
Nickel Alloy ◽  
Silica Glass ◽  
Iron Nickel

CTAB-mediated synthesis of iron–nickel alloy nanochains and their magnetic properties

2012 ◽  
Vol 407 ◽  
pp. 23-28 ◽  
Author(s):  
Xuegang Lu ◽  
Qianru Liu ◽  
Ge Huo ◽  
Gongying Liang ◽  
Qianjin Sun ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Nickel Alloy ◽  
Iron Nickel

Internal Stresses in Nanocrystalline Nickel and Nickel-Iron Alloys

2012 ◽  
Vol 706-709 ◽  
pp. 1607-1611 ◽  
Author(s):  
J.D. Giallonardo ◽  
Uwe Erb ◽  
G. Palumbo ◽  
G.A. Botton ◽  
C. Andrei
Keyword(s):  
Grain Size ◽  
Internal Stress ◽  
Structural Difference ◽  
Intrinsic Stress ◽  
Internal Stresses ◽  
Second Phase ◽  
Nickel Iron ◽  
Second Phase Particles ◽  
Second Phases ◽  
Rule Out

Nanocrystalline metals are often produced in a state of stress which can adversely affect certain properties, e.g. corrosion resistance, wear, fatigue strength, etc. This stress is referred to as internal or “intrinsic” stress since it is not directly caused by applied loads. The structural causes of these stresses in nanocrystalline materials are not fully understood and are therefore an area of particular interest. The internal stresses of nanocrystalline Ni and Ni-16wt%Fe were measured and found to increase with the addition of iron. Characterization using HR-TEM revealed no signs of porosity, second phase particles, or a high density of dislocations. Both materials possessed well defined high-angle grain boundaries. The main structural difference between the two materials was found to be grain size and correspondingly, a decrease in grain size resulted in an increase in internal stress which supports the applicability of the coalescence theory. The current study also provides evidence to rule out the effect of voids (or porosity), dislocations, and second phases as possible causes of internal stress.

Sign in / Sign up

Export Citation Format

Share Document