Elevated temperature axial and torsional fatigue behavior of Haynes 188
Article Abstract:
The high-temperature and torsional low-cycle fatigue life of the Haynes 188 wrought cobalt-base superalloy was investigated. Experiments were performed wherein a single specimen was subjected to axial and torsional load excursions at various temperatures. The mean coefficient of thermal expansion, elastic modulus, shear modulus and stress-strain curves were then measured. The measured values were used to evaluate several multiaxial fatigue life models. Results show that the models estimate the torsional fatigue lives to varying degrees of accuracy.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1995
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Fatigue design model based on damage mechanisms revealed by acoustic emission measurements
Article Abstract:
A preliminary damage-prediction model has been developed using experimental data obtained by means of acoustic emission (AE) tests performed on Incoloy 901 superalloy. The model uses the AE concept to determine cumulative fatigue damage under cyclic loading at arbitrary stress ratios, including fully-reversed loading. These processes are identified by their AE signature and preliminary formulated as a damage relation in terms of the total AE ringdown counts.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1995
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