Header menu link for other important links
X
Fatigue life extension of notches in AISI 304L weldments using deep cryogenic treatment
D. R.Gopalakrishna Achar
Published in
2005
Volume: 12
   
Issue: 2
Pages: 263 - 271
Abstract
The fatigue crack initiation lives of notches in AISI 304L austenitic stainless steel weldments were improved after the deep cryogenic treatment of specimens at liquid nitrogen temperature (-185 °C). During this treatment, a significant change in microstructure is developed. Strain induced martensitic transformation occurs. During this transformation, the weld metal expands. This expansion relieves the tensile residual stresses and induces compressive stresses around the welded part. However, it was observed that the fatigue crack propagation properties were not changed due to this treatment. Center crack tension type specimens were used in this investigation. Constant amplitude fatigue experiments with R = 0 were carried out with a frequency of 30 Hz. © 2004 Elsevier Ltd. All rights reserved.
About the journal
JournalEngineering Failure Analysis
ISSN13506307
Open AccessNo
Concepts (14)
  •  related image
    Crack initiation
  •  related image
    Ductility
  •  related image
    Microstructure
  •  related image
    Nitrogen
  •  related image
    Residual stresses
  •  related image
    Stresses
  •  related image
    Welding
  •  related image
    Liquid nitrogen temperature
  •  related image
    STAINLESS STEEL WELDMENTS
  •  related image
    NOTCHED BAR TENSILE TESTING
  •  related image
    Crack propagation
  •  related image
    Fatigue
  •  related image
    Stainless steel
  •  related image
    Weld