Computational investigation of superalloy persistent slip bands formation

Jianfeng Huang, Zhonglai Wang, Yuanxin Luo, Yun Li, Erfu Yang, Yi Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

1 Citation (Scopus)

Abstract

Persistent slip bands (PSB) is the important and typical microstructure generated during fatigue crack initiation. Intensive works have been done to investigate the mechanisms of the formation of persistent slip bands in the past decade. In this paper, a molecular dynamics (MD) simulation associated with embedded atom model (EAM) is applied on the PSBs formation in nickel-base superalloys with different microstructure and temperature under tensile-tensile loadings. Simulation results show that PSBs formed within the γ phase by massive dislocations pile-up and propagation which can penetrate the grain. Also, the temperature will affect the material fatigue performance and blur PSBs appearance. The simulation results are in strong agreement with the experimental test results published before.

Original languageEnglish
Title of host publication2015 21st International Conference on Automation and Computing
Subtitle of host publicationAutomation, Computing and Manufacturing for New Economic Growth, ICAC 2015
Number of pages6
DOIs
Publication statusPublished - 30 Oct 2015
Event21st International Conference on Automation and Computing, ICAC 2015 - University of Strathclyde, Glasgow, United Kingdom
Duration: 11 Sep 201512 Sep 2015

Conference

Conference21st International Conference on Automation and Computing, ICAC 2015
CountryUnited Kingdom
CityGlasgow
Period11/09/1512/09/15

Keywords

  • computational simulations
  • molecular dynamics
  • persistent slip bands
  • superalloys

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