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Criteria evaluation...
Criteria evaluation for the transition of cracking modes in a single-crystal nickel-base superalloy
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- Busse, Christian (author)
- Linköpings universitet,Mekanik och hållfasthetslära,Tekniska fakulteten
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- Gustafsson, D. (author)
- Siemens Ind Turbomachinery AB, Sweden
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- Palmert, Frans (author)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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- Sjodin, B. (author)
- Siemens Ind Turbomachinery AB, Sweden
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- Almroth, P. (author)
- Siemens Ind Turbomachinery AB, Sweden
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- Moverare, Johan (author)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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- Simonsson, Kjell (author)
- Linköpings universitet,Mekanik och hållfasthetslära,Tekniska fakulteten
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- Leidermark, Daniel (author)
- Linköpings universitet,Mekanik och hållfasthetslära,Tekniska fakulteten
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(creator_code:org_t)
- ELSEVIER, 2020
- 2020
- English.
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In: Theoretical and applied fracture mechanics (Print). - : ELSEVIER. - 0167-8442 .- 1872-7638. ; 106
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https://liu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Single-crystal nickel-base superalloys frequently experience two distinct fatigue crack growth modes. It has been observed that, under certain conditions, cracks transition from a path perpendicular to the loading direction to a crystallographic slip plane. As crystallographic cracking is associated with an increased fatigue crack growth rate, it is important to be able to predict when this transition occurs. In this work three different criteria for crystallographic cracking based on resolved anisotropic stress intensity factors are evaluated in a three-dimensional finite element context. The criteria were calibrated and evaluated using isothermal fatigue experiments on two different specimen geometries. It is suggested by the results, that a threshold value of a resolved shear stress intensity factor can act as a conservative criterion indicating cracking mode transition. Further, a trend hinting towards a loading frequency dependency could be observed.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)
Keyword
- Single-crystal nickel-base superalloys; Finite element analysis; Fracture mechanics; Resolved stress intensity factor; Crystallographic cracking
Publication and Content Type
- ref (subject category)
- art (subject category)
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