Creep strength and minimum strain rate estimation from Small Punch Creep tests

S. Holmström (Corresponding Author), Y. Li, P. Dymacek, E. Vacchieri, S. P. Jeffs, R. J. Lancaster, D. Omacht, Z. Kubon, E. Anelli, Joni Rantala, A. Tonti, S. Komazaki, Naveena, M. Bruchhausen, R. C. Hurst, P. Hähner, M. Richardson, D. Andres

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)

Abstract

A new standard is currently being developed under the auspices of ECISS/TC 101 WG1 for the small punch testing technique for the estimation of both tensile and creep properties. Annex G of the new standard is covering the assessment and evaluation of small punch creep (SPC) data. The main challenge for estimating uniaxial creep properties from SPC data is the force to equivalent stress conversion between SPC and uniaxial creep tests. In this work a range of SPC assessment methodologies, benchmarked for the standard, are compared for verifying the best practice used in the standard. The estimated equivalent stresses for SPC are compared to uniaxial creep stresses at equal rupture times, using three alternative models. In-depth analyses are performed on SPC and uniaxial creep data for P92, F92 and 316 L steel tested within an inter-laboratory round robin. The formulation for SPC equivalent creep strain rate in the standard is also assessed.

Original languageEnglish
Pages (from-to)161-172
Number of pages12
JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume731
DOIs
Publication statusPublished - 25 Jul 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • Creep strain rate
  • Creep strength
  • Small Punch Creep test
  • SPC
  • Standardization

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    Holmström, S., Li, Y., Dymacek, P., Vacchieri, E., Jeffs, S. P., Lancaster, R. J., Omacht, D., Kubon, Z., Anelli, E., Rantala, J., Tonti, A., Komazaki, S., Naveena, Bruchhausen, M., Hurst, R. C., Hähner, P., Richardson, M., & Andres, D. (2018). Creep strength and minimum strain rate estimation from Small Punch Creep tests. Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 731, 161-172. https://doi.org/10.1016/j.msea.2018.06.005