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Modern steam turbines must retain a very high reliability throughout their service life of typically 200,000 hours. Prominent among the reasons for failure which were observed in steam turbines during the last 20 years were stress corrosion cracking and corrosion fatigue. The major influential parameters of stress corrosion and corrosion fatigue behaviour of steam-turbine rotor and blade materials in service-related environments are described in quantitative terms. Five topics are given special attention: stress corrosion crack initiation, stress corrosion crack propagation, corrosion fatigue crack initiation, corrosion fatigue crack propagation and pitting corrosion. It is shown that fracture mechanics can be used to understand the transition from crack initiation to crack growth.

Additional information

Authors: SPEIDEL M O, Institute of Metallurgy, Zurich (CH);DENK J, Asea Brown Boveri, Baden (CH);SCARLIN B, Asea Brown Boveri, Baden (CH)
Bibliographic Reference: EUR 13186 EN (1991) 65 pp., FS, ECU 6.25
Availability: (2)
ISBN: ISBN 92-826-2017-4
Record Number: 199110187 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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