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

0494390 - ÚFM 2019 RIV CH eng J - Journal Article
Holmström, S. - Li, Y. - Dymáček, Petr - Vacchieri, E. - Jeffs, S. P. - Lancaster, R. J. - Omacht, D. - Kuboň, Z. - Anelli, E. - Rantala, J. - Tonti, A. - Komazaki, S. - Naveena, N. - Bruchhausen, M. - Hurst, R. C. - Hahner, P. - Richardson, M. - Andrés, D.
Creep strength and minimum strain rate estimation from Small Punch Creep tests.
Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. Roč. 731, JUL (2018), s. 161-172. ISSN 0921-5093. E-ISSN 1873-4936
Institutional support: RVO:68081723
Keywords : welded-joint * property * steel * life * Small Punch Creep test * spc * Creep strength * Creep strain rate * Standardization
OECD category: Materials engineering
Impact factor: 4.081, year: 2018

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.
Permanent Link: http://hdl.handle.net/11104/0287802