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Abstract

Selected data on the crack initiation and on the growth of cracks under high temperature low cycle fatigue conditions are presented for PM Astroloy, a disk material for application in aero - gas turbines. The crack initiation life and the life to failure are strongly influenced by several time dependent processes (oxidation, time dependent deformation, dynamic strain ageing), operating individually or simultaneously depending on the testing conditions. The crack growth data show a short crack behaviour up to crack sizes of the order of ten times the grain size, their growth data are, therefore, unconservative.

Additional information

Authors: BRESSERS J JRC PETTEN ESTAB. (THE NETHERLANDS), JRC PETTEN ESTAB. (THE NETHERLANDS)
Bibliographic Reference: 5TH EUROPEAN CONFERENCE ON FRACTURE, LISBOA (PORTUGAL), SEPT 17-21, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31563 ORA
Availability: Can be ordered online
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