Extrapolation of creep strain data for pure copper

High-temperature plants operating in the creep regime are typically designe d 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 p resent paper a new method for the simultaneous extrapolation of creep strai n and rupture data is proposed. This approach has the advantage that it imp roves the statistical basis for the evaluation and makes it possible to avo id physically impossible results frequently obtained if creep strain data a re analyzed separately. The method has successfully been applied to phospho rus-alloyed pure copper.