Internal strains between grains during creep deformation of an austenitic stainless steel

B. Chen*, J. N. Hu, Y. Q. Wang, S. Kabra, A. C F Cocks, D. J. Smith, P. E J Flewitt

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

13 Citations (Scopus)

Abstract

Internal strains that develop between grains during creep of an austenitic stainless steel were measured using in situ neutron diffraction. The secondary creep pre-strained test specimens were considered. Measurements were undertaken before, during and post creep deformation at 550 °C. There was no measurable change of internal strains between grains during in situ creep for 4 h at 550 °C. In addition, the effect of increasing/reducing temperatures in a range from 470 to 550 °C on the internal strains was measured and interpreted with respect to contributions from thermal expansion/contraction. No further internal misfit strains between grains were created when specimen crept during the dwell time at 530, 510, 490 and 470 °C. Results are discussed with respect to (i) the general structure of self-consistent models and (ii) the optimised use of neutron sources for creep studies.

Original languageEnglish
JournalJournal of Materials Science
Volume50
Issue number17
DOIs
Publication statusPublished - 3 Jun 2015

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