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A method is described for assessing the behaviour of defects in 2.25 Cr1Mo steel components at 600 C. Creep crack growth in both notched tube specimens, exposed to internal pressure and axial loading, and conventional creep crack growth specimens, has been studied. The development of experimental methods involved enables this work to be extended to include the technically challenging area of exposure to high pressure hydrogen environments, where the phenomenon of hydrogen attack may affect crack growth behaviour. Appropriate limit load solutions and reference stress calculations have been used to analyse the stress rupture of both compact tension and component specimens. Evaluations of crack growth rates in terms of the C* integral indicate that it is a suitable parameter for correlating data from compact tension and component specimens.

Additional information

Authors: LOONEY L, JRC Petten (NL);HURST R C, JRC Petten (NL);TAYLOR D, Trinity College, Dublin (IE)
Bibliographic Reference: Paper presented: Irish Materials Forum, Dublin (IE), September 14-16, 1992
Availability: Available from (1) as Paper EN 37015 ORA
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