High-temperature crack growth in steam turbine materials
Modern steam turbines must retain a very high reliability throughout their service life of typically 200,000 hours, which in practice extends over more than 25 years. One of the features that must be considered at the design and manufacturing stages and during the assessment of fitness, carried out periodically during the service life, is the growth of the manufacturing-type defects at temperatures up to about 550 C. Within the research programme COST 505 on materials for steam turbines, one coordination group studied this problem with a view to enabling a more accurate evaluation of defect acceptability on the basis of data gathered using laboratory test-pieces. The work was structured under three headings: (i) creep crack initiation and growth in terms of K; (ii) creep crack growth in 1%CrMoV steel and Alloy 800H - an evaluation of the results of the COST 505 and an EGF round robin; (iii) high temperature fatigue crack growth in steam turbine materials. In each part, solutions are given according to the state of the art.
Bibliographic Reference: EUR 14678 EN (1994) 176 pp., FS, ECU 20
ISBN: ISBN 92-826-7536-X
Record Number: 199411120 / Last updated on: 1994-11-25
Original language: en
Available languages: en