Influence of control mode on thermomechanical fatigue testing of circumferentially-notched specimens

P. Fernandez-Zelaia; R. W. Neu

doi:10.1520/MPC20130043

Influence of control mode on thermomechanical fatigue testing of circumferentially-notched specimens

P. Fernandez-Zelaia, R. W. Neu

Research output: Contribution to journal › Article › peer-review

Abstract

The aim of this study is to understand the influence of experimentally applied boundary conditions on circumferentially-notched specimens under thermomechanical fatigue loadings (TMF) in two Ni-base superalloys, one equiaxed polycrystalline, and one directionally-solidified. TMF experiments were performed under both force-controlled and displacement-controlled conditions. Notch severities ranged from k_t = 1:3 to k_t = 2. The notch response was evaluated by finite element analysis using temperature-dependent viscoplasticity. The experiments and analyses are used to assess the impact of the applied boundary conditions on calculated and observed fatigue crack initiation lives.

Original language	English
Pages (from-to)	91-109
Number of pages	19
Journal	Materials Performance and Characterization
Volume	3
Issue number	2
DOIs	https://doi.org/10.1520/MPC20130043
State	Published - Jan 17 2014
Externally published	Yes

Keywords

Boundary conditions
Ni-base superalloy
Notch analysis
Notched specimens
Thermomechanical fatigue

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10.1520/MPC20130043

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title = "Influence of control mode on thermomechanical fatigue testing of circumferentially-notched specimens",

abstract = "The aim of this study is to understand the influence of experimentally applied boundary conditions on circumferentially-notched specimens under thermomechanical fatigue loadings (TMF) in two Ni-base superalloys, one equiaxed polycrystalline, and one directionally-solidified. TMF experiments were performed under both force-controlled and displacement-controlled conditions. Notch severities ranged from kt = 1:3 to kt = 2. The notch response was evaluated by finite element analysis using temperature-dependent viscoplasticity. The experiments and analyses are used to assess the impact of the applied boundary conditions on calculated and observed fatigue crack initiation lives.",

keywords = "Boundary conditions, Ni-base superalloy, Notch analysis, Notched specimens, Thermomechanical fatigue",

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N2 - The aim of this study is to understand the influence of experimentally applied boundary conditions on circumferentially-notched specimens under thermomechanical fatigue loadings (TMF) in two Ni-base superalloys, one equiaxed polycrystalline, and one directionally-solidified. TMF experiments were performed under both force-controlled and displacement-controlled conditions. Notch severities ranged from kt = 1:3 to kt = 2. The notch response was evaluated by finite element analysis using temperature-dependent viscoplasticity. The experiments and analyses are used to assess the impact of the applied boundary conditions on calculated and observed fatigue crack initiation lives.

AB - The aim of this study is to understand the influence of experimentally applied boundary conditions on circumferentially-notched specimens under thermomechanical fatigue loadings (TMF) in two Ni-base superalloys, one equiaxed polycrystalline, and one directionally-solidified. TMF experiments were performed under both force-controlled and displacement-controlled conditions. Notch severities ranged from kt = 1:3 to kt = 2. The notch response was evaluated by finite element analysis using temperature-dependent viscoplasticity. The experiments and analyses are used to assess the impact of the applied boundary conditions on calculated and observed fatigue crack initiation lives.

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KW - Notch analysis

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Influence of control mode on thermomechanical fatigue testing of circumferentially-notched specimens

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Keywords

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