Accession Number:

ADA621000

Title:

Constitutive Model for Anisotropic Creep Behaviors of Single-Crystal Ni-Base Superalloys in the Low-Temperature, High-Stress Regime (Postprint)

Descriptive Note:

Journal article

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE

Personal Author(s):

• Woodward, Christopher
• Dimiduk, Dennis M.
• Uchic, Michael D.
• Choi, Yoon Suk
• Parthasarathy, Triplicane A.

Report Date:

2012-01-19

Pagination or Media Count:

12.0

Abstract:

A crystallographic constitutive model is developed to capture orientation-sensitive primary and secondary creep behaviors within approximately 20 deg from the 0 0 1 orientation in single crystal superalloys for the low-temperature and high-stress regime. The crystal plasticity-based constitutive formulations phenomenologically incorporate experimentally observed dislocation micromechanisms.

Descriptors:

• *CREEP
• *SUPERALLOYS
• ANISOTROPY
• CRYSTALLOGRAPHY
• CRYSTALS
• DISLOCATIONS
• FINITE ELEMENT ANALYSIS
• HARDENING
• MICROSTRUCTURE
• NICKEL ALLOYS
• NUCLEATION
• PLASTIC PROPERTIES
• PROPAGATION
• SHEAR PROPERTIES
• STRESSES

Subject Categories:

• Properties of Metals and Alloys
• Crystallography
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE