The Interaction of Cyclic Shear and Axial Tension in Cyclic Creep of Titanium.
GEORGE WASHINGTON UNIV WASHINGTON D C INST FOR THE STUDY OF FATIGUE FRACTURE AND STRUCTURAL RELIABILITY
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The cyclic creep of commercially pure titanium was determined as a function of cyclic torsional strain amplitude and constant axial stress. For a fixed axial stress, the axial strain is proportional to the square of the cyclic torsional strain. Previous experiments have indicated a linear proportionality, but these more expensive experiments show conclusively that there is a quadratic proportionality. For a fixed peak cyclic torsional strain amplitude the axial strain is linearly proportional to the axial stress. In these tests no point of instability in the cyclic strain is observed as either axial stress or cyclic torsional strain amplitude is increased. This indicates that no truly elastic response is observed in this alloy under these cyclic test conditions.
- Metallurgy and Metallography