Accession Number:

ADA141112

Title:

Failure by Creep Cracking and Creep Fatigue Interaction in Nickel Base Superalloys.

Descriptive Note:

Final technical rept.,

Corporate Author:

CORNELL UNIV ITHACA NY DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s):

• Raj,R.

Report Date:

1984-01-01

Pagination or Media Count:

45.0

Abstract:

The objective of this investigation was to study the mechanisms of failure under conditions of creep-fatigue interaction, and creep-crack-growth. The approach was to identify the mechanisms and then develop models for describing failure in terms of the loading variables and the microstructure. In the following sections, the results from each topic are summarized. Further details of the work are available in publications. Author

Descriptors:

• *Superalloys
• *Nickel alloy inconel
• *Failure(Mechanics)
• *Cracking(Fracturing)
• *Creep tests
• Fatigue(Mechanics)
• Cavities
• High temperature
• Embrittlement
• Crack propagation
• Nucleation
• Microstructure
• Interactions
• Mechanical properties
• Grain boundaries
• Structural properties
• Modulus of elasticity
• Equations
• Computations

Subject Categories:

• Properties of Metals and Alloys
• Test Facilities, Equipment and Methods
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE