Paper Title:
Effect of Temperature on the Low Cycle Fatigue of Cast Inconel 792-5A
  Abstract

Cyclic strain control tests have been performed on cylindrical specimens of cast polycrystalline Inconel 792-5A superalloy at 23, 500, 700 and 800 °C in laboratory atmosphere to study the effect of temperature on the fatigue behavior. Cyclic hardening-softening curves and fatigue life curves were measured. Scanning electron microscopy was used to investigate the surface relief. Low amplitude straining was characterized by saturation of the stress amplitude. In room temperature high amplitude straining cyclic hardening was followed by marked saturation. Pronounced continuous hardening until failure was observed at 500 °C. Initial cyclic hardening was followed by softening at 800 °C. A systematic shift of the Manson-Coffin and of the Basquin curves to lower fatigue lives was found when temperature was increased. Fatigue cracks were observed to initiate from surface slip markings at all temperatures.

  Info
Periodical
Key Engineering Materials (Volumes 345-346)
Edited by
S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim
Pages
383-386
DOI
10.4028/www.scientific.net/KEM.345-346.383
Citation
M. Petrenec, K. Obrtlík, J. Polák, J. Man, "Effect of Temperature on the Low Cycle Fatigue of Cast Inconel 792-5A", Key Engineering Materials, Vols. 345-346, pp. 383-386, 2007
Online since
August 2007
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Price
$32.00
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