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Orientation-dependent crack-tip blunting and crack propagation in a single crystal BCC iron
SURAJIT KUMAR PAUL SUNIL KUMAR S TARAFDER
Volume 41 Issue 6 December 2018 Article ID 0148
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https://www.ias.ac.in/article/fulltext/boms/041/06/0148 -
Keywords
Crack propagation ;crack-tip blunting ;molecular dynamics ;crystal orientation ;BCC iron. -
Abstract
Atomistic simulations of cracks with four different orientations in body-centered cubic single crystal iron are presented using molecular dynamics. Crystal orientation has considerable effect on the activation and evolution ofcrack propagation mechanisms. The results reveal that (a) crack-tip blunting depends on the crystallographic orientation, (b) continuous generation of dislocations form crack tip occurs for large crack-tip blunting, and (c) absence of deformation activities like dislocation generation, twin formation, etc. at the crack tip results in crack propagation in a brittle manner.
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Author Affiliations
SURAJIT KUMAR PAUL1 SUNIL KUMAR2 S TARAFDER2
- Department of Mechanical Engineering, Indian Institute of Technology Patna, Bihta, Patna 801106, India
- Division of Materials Engineering, CSIR-National Metallurgical Laboratory, Jamshedpur 831007, India
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Dates
- Published
- 15 December 2018
- Manuscript received
- 27 November 2017
- Accepted
- 19 January 2018
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Bulletin of Materials Science
Volume 43, 2020
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