New relationships, incorporating the activation energy for matrix diffusion (300 kJ mol-1) and the ultimate tensile strength values at the creep temperature, allow effective rationalization of the multi-batch stress rupture properties for Grade 92 steel (9Cr-0.5Mo-1.8W-V-Nb). These approaches lead to straightforward procedures for extrapolation of short-term results, with creep life measurements from tests lasting up to only 5000 h providing reasonable estimates of 100,000 h rupture strengths. Validation of this new methodology would therefore offer the prospect of cost-effective acquisition of long-term creep design data.
WILSHIRE Brian;
SCHARNING Penny;
HURST Roger;
2009-10-29
ELSEVIER SCIENCE SA
JRC53879
0921-5093,
www.elsevier.com/locate/msea,
https://publications.jrc.ec.europa.eu/repository/handle/JRC53879,
10.1016/j.msea.2008.04.125,
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