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Crack growth micro-mechanisms in the IN718 alloy under the combined influence of fatigue, creep and oxidation / D.G. Leo Prakash, M.J Walsh, D Maclachlan, A.M Korsunsky, Leo Prakash
International Journal of Fatigue, Volume: 31, Issue: 11-12, Pages: 1966 - 1977
Swansea University Author: Leo Prakash
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The objective of the present study is to review the different phenomena responsible for crack growth in the IN718 nickel-base superalloy under the combination of fatigue, creep and oxidation. We review the descriptions of the micro-mechanisms found in the literature, with a special emphasis on the t...
|Published in:||International Journal of Fatigue|
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The objective of the present study is to review the different phenomena responsible for crack growth in the IN718 nickel-base superalloy under the combination of fatigue, creep and oxidation. We review the descriptions of the micro-mechanisms found in the literature, with a special emphasis on the time-dependent effects. The changes in the microscopic appearance of fracture surfaces due to the variations in the temperature, frequency, dwell time, microstructure and partial pressure of oxygen are considered. Elucidation of these microscopic aspects of crack growth requires establishing a connection with macroscopic conditions and parameters of crack growth, and these topics are touched upon in the present review insofar it is necessary. The review allows the identification of important parameters that control component durability, and need to be included in fatigue crack growth modelling for the development of better predictive lifing assessments.
This is one of the rare papers, which provides the mechanisms of the combined influence of fatigue, creep and oxidation, and link them to lifing methods of an important aerospace metal. It is published in the top ranked journal within the research are of fatigue (International Journal of Fatigue, 5 year Impact factor: 1.974, citations: 13). Furthermore, interest generated by this paper resulted in the credit as ‘Top25 Hottest Articles’ ( for the period October to December 2009).
Fatigue crack growth Mechanisms, Creep, Oxidation, High temperature
College of Engineering