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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/19103

Title: Modelling of cyclic plasticity and crack-tip deformation in a single crystal nickel-based superalloy
Authors: Lin, B.
Farukh, Farukh
Zhao, Liguo
Roy, Anish
Silberschmidt, Vadim V.
Keywords: Crystal plasticity
Discrete dislocation dynamics
Representative volume element
Finite element
Cyclic deformation
Issue Date: 2015
Publisher: © The authors. Published by Institute of Materials, Minerals and Mining
Citation: LIN, B. ...et al., 2015. Modelling of cyclic plasticity and crack-tip deformation in a single crystal nickel-based superalloy. IN: Parsons 2015: The 9th International Charles Parsons Turbine and Generator Conference, Loughborough, 15-17th Sept.
Abstract: In this paper, cyclic plasticity in a single crystal nickel-based superalloy CMSX4 at elevated temperature was modelled using crystal plasticity (CP) and discrete dislocation dynamics (DDD). The CP modelling was carried out at the continuum level based on shear deformation along the octahedral slip systems. The DDD approach was implemented for a representative volume element with periodical boundary conditions. The DDD model parameters were calibrated using the predicted response by the CP model. The obtained numerical results by the two models compared with each other under strain-controlled monotonic and cyclic loading conditions in both <001> and <111> orientations. The CP model was further applied to study crack-tip deformation under fatigue loading. Stress-strain responses, as well as stress and strain distributions, near the crack tip were particularly monitored to assess the role of cyclic plasticity in controlling fatigue-crack propagation. The work has applications in life assessment of nickel-based superalloy components for high-temperature applications
Description: This is a conference paper.
Sponsor: The work was funded by the EPSRC (Grants EP/K026844/1 and EP/M000966/1) of the UK.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/19103
Publisher Link: https://www.iom3online.org/iom/frontend/reg/thome.csp?pageID=196094&ef_sel_menu=1490&eventID=423&eventID=423
Appears in Collections:Conference Papers and Contributions (Mechanical, Electrical and Manufacturing Engineering)

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