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Modelling of cyclic plasticity and crack-tip deformation in a single crystal nickel-based superalloy

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conference contribution
posted on 23.10.2015, 10:44 by Bing Lin, Farukh Farukh, Liguo ZhaoLiguo Zhao, Anish RoyAnish Roy, Vadim SilberschmidtVadim Silberschmidt
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

Funding

The work was funded by the EPSRC (Grants EP/K026844/1 and EP/M000966/1) of the UK.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Parsons 2015: The 9th International Charles Parsons Turbine and Generator Conference

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.

Publisher

© The authors. Published by Institute of Materials, Minerals and Mining

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2015

Notes

This is a conference paper.

Language

en

Location

Loughborough, UK