The European Creep Collaborative Committee (ECCC) approach to creep data assessment has now been established for almost ten years. The methodology covers the analysis of rupture strength and ductility, creep strain, and stress relaxation data, for a range of material conditions. This paper reviews the concepts and procedures involved. The original approach was devised to determine data sheets for use by committees responsible for the preparation of National and International Design and Product Standards, and the methods developed for data quality evaluation and data analysis were therefore intentionally rigorous. The focus was clearly on the determination of long-time property values from the largest possible data sets involving a significant number of observations in the mechanism regime for which predictions were required. More recently, the emphasis has changed. There is now an increasing requirement for full property descriptions from very short times to very long and hence the need for much more flexible model representations than were previously required. There continues to be a requirement for reliable long-time predictions from relatively small data sets comprising relatively short duration tests, in particular, to exploit new alloy developments at the earliest practical opportunity. In such circumstances, it is not feasible to apply the same degree of rigor adopted for large data set assessment. Current developments are reviewed.
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May 2008
Technology Review
The European Creep Collaborative Committee (ECCC) Approach to Creep Data Assessment
Stuart Holdsworth
Stuart Holdsworth
EMPA Swiss Federal Laboratories for Materials Testing and Research
, CH-8600 Dubendord, Switzerland
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Stuart Holdsworth
EMPA Swiss Federal Laboratories for Materials Testing and Research
, CH-8600 Dubendord, SwitzerlandJ. Pressure Vessel Technol. May 2008, 130(2): 024001 (6 pages)
Published Online: March 25, 2008
Article history
Received:
May 7, 2007
Revised:
October 25, 2007
Published:
March 25, 2008
Citation
Holdsworth, S. (March 25, 2008). "The European Creep Collaborative Committee (ECCC) Approach to Creep Data Assessment." ASME. J. Pressure Vessel Technol. May 2008; 130(2): 024001. https://doi.org/10.1115/1.2894296
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