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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.

    • Author Affiliations

       

      SURAJIT KUMAR PAUL1 SUNIL KUMAR2 S TARAFDER2

      1. Department of Mechanical Engineering, Indian Institute of Technology Patna, Bihta, Patna 801106, India
      2. Division of Materials Engineering, CSIR-National Metallurgical Laboratory, Jamshedpur 831007, India
    • Dates

       
  • Bulletin of Materials Science | News

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