Journal Published Online: 17 January 2014
Volume 3, Issue 2

Influence of Control Mode on Thermomechanical Fatigue Testing of Circumferentially-Notched Specimens

CODEN: MPCACD

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.

Author Information

Fernandez-Zelaia, P.
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, US
Neu, R.
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, US Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, US
Pages: 19
Price: $25.00
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Details
Stock #: MPC20130043
ISSN: 2165-3992
DOI: 10.1520/MPC20130043