Theoretical and Experimental Investigations of Elevated Temperature Deformation and Failure Behavior in Single Crystal Nickel-Based Superalloys

Project: Research project

Description

Statement of Work The objective of the proposed 3-year research is to quantify elevated temperature in situ deformation and failure behavior of single crystal nickel-based superalloys. The proposed research will investigate elevated temperature deformation and failure behavior in single crystal Ni-based superalloys using a combination of small scale high temperature mechanical testing (in situ SEM, in situ micropillar compression, indentation creep, and small-specimen creep) and extended finite element methods . This research will augment experimental studies at MSU with high temperature large-scale mechanical testing. The goal of this three year proposal is to systematically characterize and quantify the role of local microstructure in high temperature properties and failure behavior of Ni-based superalloys. This approach is employed because quantifying local deformation behavior, a measure of local microstructure attributes, is critical in predicting macroscopic deformation behavior, such as crack nucleation and role of secondary slip. Through qualitatively describing critical microstructural features that alter localized cyclic deformations and thus limiting/reducing the size/amount of the digital data requirement, this effort will complement current efforts in fatigue prognosis that use the futuristic Digital Twin concept. Furthermore, this work will help support a US citizen Ph.D. student
StatusFinished
Effective start/end date9/1/123/31/15

Funding

  • DOD-USAF-AFRL: Air Force Office of Scientific Research (AFOSR): $119,999.00

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Superalloys
Nickel
Single crystals
Mechanical testing
Creep
Temperature
High temperature testing
High temperature properties
Microstructure
Indentation
Compaction
Nucleation
Fatigue of materials
Students
Cracks
Finite element method
Scanning electron microscopy