Long-term creep design data for forged 1Cr–1Mo–0.25V steel

Article type: Research Article

Authors: Wilshire, B. | Burt, H.

Affiliations: Materials Research Centre, School of Engineering, University of Wales, Swansea SA2 8PP, UK

Note: [] Corresponding author. Tel.: +44 1792 295243; Fax: +44 1792 295244; E-mail: b.wilshire@swansea.ac.uk.

Abstract: By analysing the shapes of short-term constant-stress creep curves, the θ methodology predicts the long-term creep and creep rupture values expected for oxidation-free conditions at 723 to 923 K, avoiding the underestimation of performance caused by testpiece oxidation during prolonged exposure in air at 823 K and above. The θ relationships also allow rationalization of multi-batch creep data sets for the 1Cr–1Mo–0.25V rotor steel, through new procedures which replace the empirical terms in traditional parametric methods with measurable properties, such as the 0.2% proof stress at the creep temperature.

Keywords: Creep, creep fracture, 1Cr–1Mo–0.25V steel

Journal: Strength, Fracture and Complexity, vol. 4, no. 2, pp. 65-73, 2006