Impression creep test of a P91 steel: a round robin programme

S. J. Brett, C. N.C. Dyson, D. Purdy, J. Shingledecker, J. Rantala, J. Eaton-Mckay, W. Sun

Research output: Contribution to journalArticleScientificpeer-review


The process of standardisation of small specimen creep testing techniques, specifically the impression creep test requires the repeatability of the test method. In this study it is accomplished through a round robin programme involving four different labs which have slightly different test set-ups adhering to predefined recommendations stated in previous work. The labs all conducted the same stepped stress test on a reference heat of grade 91 power plant steel and the displacement traces of the tests are analysed to outline the effects of different test set-ups and their efficacies. Main differences are in temperature control and loading application and control.

Original languageEnglish
Pages (from-to)529-534
Number of pages6
JournalMaterials at High Temperatures
Issue number6
Early online date2017
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed


  • Impression creep test
  • P91
  • round robin programme

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