Creep and fatigue are important and life-limiting damage mechanisms for many gas turbine components and therefore must be accounted for in design. Creep is promoted by high levels of stress and temperature that also drive microstructural changes in turbine materials. Fatigue is caused by fluctuating loads from, for example, rotation, vibration or thermal cycling, and can also limit component design and life at more modest temperatures. The main characteristics of creep, fatigue, microstructural damage and their combined impact are introduced below, with emphasis on aspects relevant in life assessment of high temperature components such as turbine blades made of superalloys.
|Title of host publication||Power plant life management and performance improvement|
|Editors||John E. Oakey|
|Publication status||Published - 2011|
|MoE publication type||D2 Article in professional manuals or guides or professional information systems or text book material|
|Series||Woodhead publishing series in energy|
Auerkari, P. (2011). Creep, fatigue and microstructural degradation in gas turbine superalloys. In J. E. Oakey (Ed.), Power plant life management and performance improvement (pp. 307-329). Woodhead Publishing. Woodhead publishing series in energy, Vol.. 23 https://doi.org/10.1533/9780857093806.3.307