Effect of Orientation and Temperature on Edge Crack Propagation of Bcc Iron under Cyclic Loading

L. Ma, C. S. Li, J. R. Guo

Abstract

The fatigue crack propagation behaviour with pre-existing edge crack was investigated in iron single crystal by molecular dynamics simulation. The results showed that the deformation characteristics of crack tip were influenced by the orientation of initial crack. The (010) [001] crack presented ductile fracture and the slip bands of crack tip were {110}<111> systems at room temperature. Nevertheless, the ( 10) [110] crack presented brittle rupture and the slip bands of crack tip were (011) [1 1] system. In (111) [11 ] crack, the main deformation of crack tip was vacancies and dislocations at room temperature. The influence of temperature on the propagation of crack was also discussed in all crack models, the results revealed that the crack growth rate and the deformation mechanisms of crack tip changed as the temperature rose, and the threshold values of stress intensity factor decreased with the increasing temperature.

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Paper Citation


in Harvard Style

Ma L., Li C. and Guo J. (2018). Effect of Orientation and Temperature on Edge Crack Propagation of Bcc Iron under Cyclic Loading.In Proceedings of the International Workshop on Materials, Chemistry and Engineering - Volume 1: IWMCE, ISBN 978-989-758-346-9, pages 20-30. DOI: 10.5220/0007434000200030


in Bibtex Style

@conference{iwmce18,
author={L. Ma and C. S. Li and J. R. Guo},
title={Effect of Orientation and Temperature on Edge Crack Propagation of Bcc Iron under Cyclic Loading},
booktitle={Proceedings of the International Workshop on Materials, Chemistry and Engineering - Volume 1: IWMCE,},
year={2018},
pages={20-30},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007434000200030},
isbn={978-989-758-346-9},
}


in EndNote Style

TY - CONF

JO - Proceedings of the International Workshop on Materials, Chemistry and Engineering - Volume 1: IWMCE,
TI - Effect of Orientation and Temperature on Edge Crack Propagation of Bcc Iron under Cyclic Loading
SN - 978-989-758-346-9
AU - Ma L.
AU - Li C.
AU - Guo J.
PY - 2018
SP - 20
EP - 30
DO - 10.5220/0007434000200030