Finite element modeling of the morphology and orientation dependence of the creep behavior in nickel-base superalloys
- Technische Univ. Berlin, Berlin (Germany)
Modern nickel-base superalloys are strengthened by a high volume fraction of hard [gamma][prime] precipitates embedded coherently in a soft matrix. The evolution of internal stresses and strains in the microstructure of single-crystal nickel-base alloys during annealing and during creep were measured by different experimental techniques and calculated using a visco-plastic model in a Finite Element Method (FEM) procedure for the cube and plate morphology under [001] load. Previous experimental work has shown that the creep behavior strongly depends on the size, orientation and shape of the [mu][prime] precipitates. In the present paper the dependence of the macroscopic creep strain on the [mu][prime] shape and arrangement is calculated by using the FEM technique. The internal stress distribution of cubes under [011] load and other load directions is studied. Macroscopic creep strains up to 3% are considered.
- OSTI ID:
- 6543860
- Journal Information:
- Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 29:1; ISSN SCRMEX; ISSN 0956-716X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CALCULATION METHODS
CREEP
CRYSTAL STRUCTURE
DATA
FINITE ELEMENT METHOD
GRAIN ORIENTATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INFORMATION
MATERIALS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MORPHOLOGY
NICKEL ALLOYS
NICKEL BASE ALLOYS
NUMERICAL DATA
NUMERICAL SOLUTION
ORIENTATION
PRECIPITATION
SEPARATION PROCESSES
STRAINS
STRESSES
THEORETICAL DATA