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- Saarimäki, Jonas, et al.
(författare)
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Time- and Cycle-Dependent Crack Propagation in Haynes 282
- 2016
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Ingår i: Journal of Materials Science and Engineering. - : Elsevier. - 2161-6213 .- 0921-5093. ; 658, s. 463-471
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Tidskriftsartikel (refereegranskat)abstract
- Haynes 282 is a promising superalloy candidate for several high-temperature applications in both aero and land-based gas turbine engines. To study the crack growth behaviour under time-dependent conditions relevant to such applications, a test program was carried out at room temperature up to 700 °C with conditions ranging from pure cyclic to sustained tensile loading. At 650 °C and high stress intensity factors the crack growth was fully time-dependent for dwell-times of 90 s and longer. At lower stress intensities, the behaviour was mainly controlled by the cyclic loading, even under dwell conditions. The behaviour under dwell-fatigue conditions was well described by a liner superposition model.
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