Determination of damage parameters for microcrack formation under creep conditionsFunded under: JRC-ADVMAT 1C
The quantitative determination of creep damage is important as a starting point for residual lifetime predictions. This study deals with the quantitative metallographic and ultrasonic determination of creep damage in the form of intergranular microcracks. A statistical model relating the A-parameter to a microstructurally-based damage parameter is presented. A second metallographic parameter, based on area counting instead of line counting, is discussed. The metallographic results in an austenitic steel are compared with those obtained by ultrasonic velocity measurements, showing a good agreement within the range of the experimental uncertainties.
Bibliographic Reference: Paper presented: International Conference on Behaviour of Defects at High Temperatures, Sheffield (GB), March 30 - April 3, 1992
Availability: Available from (1) as Paper EN 36930 ORA
Record Number: 199210950 / Last updated on: 1994-12-02
Original language: en
Available languages: en