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

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

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Paper

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 IWMCE - Volume 1, 20-30, 2018 , Xiamen, China

Authors: L. Ma ; C. S. Li and J. R. Guo

Affiliation: College of Physics and Electronic Science and Hunan University of Arts and Science, China

Keyword(s): molecular dynamics; crack propagation; orientation; temperature

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 several formats:

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 - IWMCE; ISBN 978-989-758-346-9, SciTePress, pages 20-30. DOI: 10.5220/0007434000200030

@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 - IWMCE},
year={2018},
pages={20-30},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007434000200030},
isbn={978-989-758-346-9},
}

TY - CONF

JO - Proceedings of the International Workshop on Materials, Chemistry and Engineering - 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
PB - SciTePress