Professor in applied materials technology, Swedish Institute for Metals Research, Stockholm,
(Received 18 July 1997; accepted 20 August 1998)
High-temperature plants operating in the creep regime are typically designed for a lifetime of 100 000 to 250 000 h. To obtain design data, short time data must be extrapolated to the lifetimes of technical interest. In the present paper a new method for the simultaneous extrapolation of creep strain and rupture data is proposed. This approach has the advantage that it improves the statistical basis for the evaluation and makes it possible to avoid physically impossible results frequently obtained if creep strain data are analyzed separately. The method has successfully been applied to phosphorus-alloyed pure copper.
Paper ID: JTE12037J