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Bulletin of Materials Science

, 41:148 | Cite as

Orientation-dependent crack-tip blunting and crack propagation in a single crystal BCC iron

  • Surajit Kumar PaulEmail author
  • Sunil Kumar
  • S Tarafder
Article
  • 24 Downloads

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 of crack 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.

Keywords

Crack propagation crack-tip blunting molecular dynamics crystal orientation BCC iron 

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Copyright information

© Indian Academy of Sciences 2018

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringIndian Institute of Technology PatnaBihta, PatnaIndia
  2. 2.Division of Materials EngineeringCSIR-National Metallurgical LaboratoryJamshedpurIndia

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