Study of creep cavitation behavior in tempered martensitic steel using synchrotron micro-tomography and serial sectioning techniques

C. Gupta, H. Toda, C. Schlacher, Y. Adachi, P. Mayr, C. Sommitsch, K. Uesugi, Y. Suzuki, A. Takeuchi, M. Kobayashi

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Two three-dimensional (3-D) techniques, namely X-ray microtomography and serial sectioning, have been applied for characterization of creep cavitation behavior in tempered martensitic steel. For this purpose samples have been extracted from a series of specimens that were subjected to creep tests over the stress range of 120-180. MPa at 600. °C. The presence of creep voids in the series of samples was un-ambiguously detected in a non-destructive manner using synchrotron X-ray microtomography with a resolution of 1. μm. The 3-D visualization of the datasets provided an assessment of the spatial distribution and morphology of the creep voids as a function of creep stress and high temperature exposure time. The quantitative analyses of the image datasets enabled the development of functional relationships between the macroscopic creep parameters (such as rupture ductility, applied stress, creep life) and cavitation characteristics (such as volume fraction, and number density). The quantitative analyses also provided an evaluation of manifestations of growth and coalescence processes in the respective datasets. A transition of cavitation behavior of the steel has been found to occur in the stress range of 120-150. MPa at 600. °C. The evolution in the pattern of cavitation and its relation to the prior-austenite boundary was explored by combining micro-tomography and serial sectioning techniques, which revealed a new possibility in the progress of cavitation in the long term creep exposed specimens of 9-12% Cr heat resistant steels.

Original languageEnglish
Pages (from-to)525-538
Number of pages14
JournalMaterials Science and Engineering A
Volume564
DOIs
Publication statusPublished - Mar 1 2013

Fingerprint

Martensitic steel
cavitation flow
Synchrotrons
Cavitation
Tomography
Creep
synchrotrons
tomography
steels
voids
Steel
creep tests
austenite
ductility
coalescing
spatial distribution
x rays
X rays
heat
Coalescence

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Study of creep cavitation behavior in tempered martensitic steel using synchrotron micro-tomography and serial sectioning techniques. / Gupta, C.; Toda, H.; Schlacher, C.; Adachi, Y.; Mayr, P.; Sommitsch, C.; Uesugi, K.; Suzuki, Y.; Takeuchi, A.; Kobayashi, M.

In: Materials Science and Engineering A, Vol. 564, 01.03.2013, p. 525-538.

Research output: Contribution to journalArticle

Gupta, C. ; Toda, H. ; Schlacher, C. ; Adachi, Y. ; Mayr, P. ; Sommitsch, C. ; Uesugi, K. ; Suzuki, Y. ; Takeuchi, A. ; Kobayashi, M. / Study of creep cavitation behavior in tempered martensitic steel using synchrotron micro-tomography and serial sectioning techniques. In: Materials Science and Engineering A. 2013 ; Vol. 564. pp. 525-538.
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