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Title: Microstructure-sensitive Crystal Viscoplasticity for Ni-base Superalloys Targeting Long-term Creep-Fatigue Interaction Modeling

Abstract

This report introduces a new temperature-dependent, microstructure-sensitive crystal viscoplasticity model for single-crystal Ni-base superalloys. The model predicts the material response of the single-crystal components in the hot gas path sections of industrial gas turbines. The influence of changes in the microstructure that occur with aging in service, critical to predicting long-term creep-fatigue interactions, is embedded into the model through the γ' precipitate morphology evolution. The model is calibrated to predict the experimental response of CMSX-8, a lower cost variant of the second generation single-crystal superalloy CMSX-4. In addition, the experimentally-measured creep-fatigue and thermomechanical fatigue behavior of CMSX-8 is reported.

Authors:
 [1]
  1. Georgia Inst. of Technology, Atlanta, GA (United States). George W. Woodruff School of Mechanical Engineering / School of Materials Science and Engineering
Publication Date:
Research Org.:
Georgia Tech Research Corporation, Atlanta, GA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1436575
DOE Contract Number:  
FE0011722
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 03 NATURAL GAS; Ni-base superalloy; Crystal viscoplasticity; Thermomechanical fatigue; Creep

Citation Formats

Neu, Richard W. Microstructure-sensitive Crystal Viscoplasticity for Ni-base Superalloys Targeting Long-term Creep-Fatigue Interaction Modeling. United States: N. p., 2018. Web. doi:10.2172/1436575.
Neu, Richard W. Microstructure-sensitive Crystal Viscoplasticity for Ni-base Superalloys Targeting Long-term Creep-Fatigue Interaction Modeling. United States. doi:10.2172/1436575.
Neu, Richard W. Wed . "Microstructure-sensitive Crystal Viscoplasticity for Ni-base Superalloys Targeting Long-term Creep-Fatigue Interaction Modeling". United States. doi:10.2172/1436575. https://www.osti.gov/servlets/purl/1436575.
@article{osti_1436575,
title = {Microstructure-sensitive Crystal Viscoplasticity for Ni-base Superalloys Targeting Long-term Creep-Fatigue Interaction Modeling},
author = {Neu, Richard W.},
abstractNote = {This report introduces a new temperature-dependent, microstructure-sensitive crystal viscoplasticity model for single-crystal Ni-base superalloys. The model predicts the material response of the single-crystal components in the hot gas path sections of industrial gas turbines. The influence of changes in the microstructure that occur with aging in service, critical to predicting long-term creep-fatigue interactions, is embedded into the model through the γ' precipitate morphology evolution. The model is calibrated to predict the experimental response of CMSX-8, a lower cost variant of the second generation single-crystal superalloy CMSX-4. In addition, the experimentally-measured creep-fatigue and thermomechanical fatigue behavior of CMSX-8 is reported.},
doi = {10.2172/1436575},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {5}
}