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      https://www.ias.ac.in/article/fulltext/boms/030/01/0069-0071

    • Keywords

       

      Steels; stress–strain measurement; plastic flow; mechanical properties; metallurgy.

    • Abstract

       

      Plastic flow behaviour of low carbon steel has been studied at room temperature during tensile deformation by varying the initial strain rate of 3.3 × 10-4 s-1 to a final strain rate ranging from 1.33 × 10-3 s-1 to 2 × 10-3 s-1 at a fixed engineering strain of 12%. Haasen plot revealed that the mobile dislocation density remained almost invariant at the juncture where there was a sudden increase in stress with a change in strain rate and the plastic flow was solely dependent on the velocity of mobile dislocations. In that critical regime, the variation of stress with time was fitted with a Boltzmann type Sigmoid function. The increase in stress was found to increase with final strain rate and the time elapsed in attaining these stress values showed a decreasing trend. Both of these parameters saturated asymptotically at a higher final strain rate.

    • Author Affiliations

       

      A Ray1 P Barat1 P Mukherjee1 A Sarkar1 S K Bandyopadhyay1

      1. Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700 064, India
    • Dates

       
  • Bulletin of Materials Science | News

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