Low-cyclic fatigue behavior of modified 9Cr-1Mo steel at elevated temperature

Guguloth, K and Sivaprasad, S and Chakrabarti, D and Tarafder, S (2014) Low-cyclic fatigue behavior of modified 9Cr-1Mo steel at elevated temperature. Materials Science and Engineering A, 604 (IF-2.409). pp. 196-206.

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The low-cycle fatigue behavior of indigenously developed modified 9Cr-1Mo steel has been evaluated using a constant strain rate (1 x 10(-3) s(-1)) at ambient temperature (25 degrees C) and at elevated temperatures (500-600 degrees C) over the strain amplitudes varying between +/- 0.7% and +/- 1.2%. Cyclic stress response showed a gradual softening regime that ended in a stress plateau until complete failure of the specimens. The estimated fatigue life decreased with the increase in test temperature. The effect of temperature on fatigue life was more pronounced at lower strain amplitudes. The cyclic deformation behavior at different temperatures has been analyzed from hysteresis loop and also in view of the changes taking place in dislocation structure and dislocation-precipitation interaction. Evaluation of low-cycle fatigue properties of modified 9Cr-1Mo steel over a range of test temperature can help in designing components for in-core applications in fast breeder reactors and in super heaters for nuclear power plants. (C) 2014 Elsevier B.V. All rights reserved

Item Type:Article
Official URL/DOI:http://eprints.nmlindia.org/6899
Uncontrolled Keywords:Low-cycle fatigue; Modified 9Cr-1Mo steel; Hysteresis loop; Masing behavior; Dislocation; Precipitation
Divisions:Material Science and Technology
ID Code:6899
Deposited By:Sahu A K
Deposited On:12 Jul 2014 07:50
Last Modified:04 May 2016 13:52
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