Wrought Ni-Base Superalloys for Steam Turbine Applications beyond 700 °C (pages 469–483)
J. Rösler, M. Götting, D. Del Genovese, B. Böttger, R. Kopp, M. Wolske, F. Schubert, H.-J. Penkalla, T. Seliga, A. Thoma, A. Scholz and C. Berger
Version of Record online: 30 JUL 2003 | DOI: 10.1002/adem.200310083
A material for the new generation of steam turbines in advanced coal-fired power plants has been found in nickel-based superalloys, yet the demands for component size and operation temperatures beyond 700 °C by far exceed the performance that such alloys undergo currently in aerospace applications. This article outlines development strategies for suitable alloys and presents two mew materials, DT 706 and DT 750. The Figure shows a microimage of DT 706 after overaging at 750 °C for 1000 hours.