Analyse des Hochtemperaturkriechens der einkristallinen Nickelbasislegierung SRR 99 in Orientierung / Analysis of High Temperature Creep in the Single Crystal Nickel-Base Alloy SRR 99 in Orientation

1989 ◽  
Vol 80 (3) ◽  
pp. 152-156
Author(s):  
Monika Feller-Kniepmeier ◽  
Thomas Link ◽  
Valeriano Catena ◽  
Jürgen Wortmann
Keyword(s):  
High Temperature ◽  
Single Crystal ◽  
Base Alloy ◽  
High Temperature Creep ◽  
Nickel Base Alloy ◽  
Temperature Creep ◽  
Nickel Base

NICROFER 7520

Alloy Digest ◽  
1996 ◽  
Vol 45 (1) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Base Alloy ◽  
Aerospace Industry ◽  
Heat Treating ◽  
High Temperature Creep ◽  
Nickel Base Alloy ◽  
Nickel Base ◽  
Scaling Resistance

Abstract Nicrofer 7520 is a high temperature creep resistant nickel-base alloy with good scaling resistance to 2000 deg F (1100 deg C). Many applications are in the aerospace industry. The alloy is sometimes called alloy 75. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-496. Producer or source: VDM Technologies Corporation.

Friction stress and recovery during high-temperature creep: interpretation of creep transients following a stress reduction

1980 ◽  
Vol 371 (1745) ◽  
pp. 279-294 ◽  
Keyword(s):  
High Temperature ◽  
Stress Reduction ◽  
Dislocation Substructure ◽  
Base Alloy ◽  
Friction Stress ◽  
Objective Method ◽  
High Temperature Creep ◽  
Nickel Base Alloy ◽  
Transient Behaviour ◽  
Nickel Base

A model based on the concept of recovery-controlled creep is developed to describe the transient behaviour following a reduction in stress at high temperature. This leads to an explicit expression relating an incubation period of zero creep At to the initial, reduced and friction stresses. The creep transients in an experimental nickel-base alloy indicate that deformation is limited by the rate of growth of the dislocation substructure, and least squares analysis shows the experimental data to be compatible with the predictions of the model, which provides an objective method of measuring the friction stress. The results indicate unambiguously the existence of a finite friction stress.

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