A Microstructural Sensitivity Study of 316H Austenitic Stainless Steel to Inter-granular Creep Fracture

B. Chen*, P. E. J. Flewitt, D. J. Smith, C. M. Younes

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

1 Citation (Scopus)

Abstract

A preliminary sensitivity examination of the ductility exhaustion based creep damage prediction model, currently used in the R5 high temperature assessment procedure, showed that material property inputs had significant effects on damage prediction. In the present work, the link between the microstructural factors and the susceptibility to inter-granular high temperature creep failure is considered. The latter was judged to be associated with the low creep ductility. Here, the longitudinal section of a creep specimen and the fracture surface were examined. Auger electron spectroscopy was used to investigate the grain boundary composition in this specimen, which failed after a creep test of 1038h at 550 degrees C under a triaxial stress state. The present results demonstrate that there is a possibility to correlate the susceptibility to high temperature inter-granular fracture from the low temperature fracture investigations. Finally, the susceptibility of the pre-treated 316H stainless steel to inter-granular high temperature failure and the contribution to the creep damage model are briefly discussed.

Original languageEnglish
Title of host publicationADVANCES IN FRACTURE AND DAMAGE MECHANICS X
EditorsZ Tonkovic, MH Aliabadi
Place of PublicationSTAFA-ZURICH
PublisherTrans Tech Publications Inc
Pages658-661
Number of pages4
ISBN (Print)*****************
DOIs
Publication statusPublished - 2012
Event10th International Conference on Fracture and Damage Mechanics (FDM 2011) - Dubrovnik, Croatia
Duration: 19 Sep 201121 Sep 2011

Publication series

NameKey Engineering Materials
PublisherTRANS TECH PUBLICATIONS LTD
Volume488-489
ISSN (Print)1013-9826

Conference

Conference10th International Conference on Fracture and Damage Mechanics (FDM 2011)
CountryCroatia
CityDubrovnik
Period19/09/1121/09/11

Keywords

  • Creep
  • Segregation
  • Auger electron spectroscopy
  • Carbide precipitation
  • Austenitic stainless steel
  • Inter-granular fracture

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