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Modelling the influence of plasticity induced softening on the low cycle fatigue and crack propagation behaviour of a nickel-based superalloy
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- Engel, B. (author)
- Univ Nottingham, England
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- Lavie, W. J. (author)
- Univ Nottingham, England
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- Rouse, J. P. (author)
- Univ Nottingham, England
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- (creator_code:org_t)
- ELSEVIER, 2024
- 2024
- English.
- In: Computational materials science. - : ELSEVIER. - 0927-0256 .- 1879-0801. ; 231
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Cyclic hysteresis loops generated during high-temperature, isothermal, low-cycle fatigue testing of the nickel-based superalloy RR1000 revealed a gradual decrease in elastic modulus of up to 25 % compared to the initial value in dependence of the accumulated plastic strain. Based on the experimental observations, a material model was developed and implemented within a finite element solver to investigate the effect of degrading stiffness on crack growth laws and crack growth predictions. It was shown that the stress intensity factor diminished by 6 to 8 % and crack growth rates were 14 to 20 % higher when stiffness degradation was accounted for.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
Keyword
- Cyclic nano-indentation; Stress intensity factor; Crack propagation; Crack growth; Nickel-based superalloy; High temperature
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Engel, B.
- Lavie, W. J.
- Rouse, J. P.
- Whittaker, M. T.
- Jones, J. P.
- Lancaster, R.
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- Stekovic, Svjetl ...
- Pattison, S. J.
- Hyde, C. J.
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- ENGINEERING AND TECHNOLOGY
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- Linköping University
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