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Abstract

When single crystal nickel based alloys are subjected to TMF (thermo-mechanical fatigue) cycling, the in-situ observation of the test specimen enables the initiation of microcracks to be detected when they reach a length of +/- 30 microns at the surface. This paper describes the implementation of a two dimensional crack shielding model into a computer program to simulate the growth of interacting, parallel surface cracks. The effect of various parameters, including the density and the initial distribution of the microcracks, is discussed and the model predictions compared with the experimental observations.

Additional information

Authors: BRESSERS J, JRC Petten (NL);TIMM J, JRC Petten (NL);MARTINEZ-ESNAOLA J M, Centro de Estudios e Investigaciones de Guipuzcoa (CEIT), San Sebastian (ES);MARTIN-MEIZOSO A, Centro de Estudios e Investigaciones de Guipuzcoa (CEIT), San Sebastian (ES);ARANA-ANTELO M, Centro de Estudios e Investigaciones de Guipuzcoa (CEIT), San Sebastian (ES)
Bibliographic Reference: Paper presented: Thermo-mechanical Fatigue Behaviour of Materials, Phoenix (US), November 14-15, 1994
Availability: Available from (1) as Paper EN 38767 ORA
Record Number: 199411525 / Last updated on: 1995-01-10
Category: PUBLICATION
Original language: en
Available languages: en