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    • Keywords


      Charpy impact toughness; TMT rebar; phosphorus; ductile–brittle transition; grain boundary segregation.

    • Abstract


      Charpy V-notch impact toughness of 600 MPa yield stress TMT rebars alloyed with copper, phosphorus, chromium and molybdenum has been evaluated. Subsize Charpy specimens were machined from the rebar keeping the tempered martensite rim intact. The copper–phosphorus rebar showed toughness of 35 J at room temperature. The toughness of copper–molybdenum and copper–chromium rebars was 52 J. The lower toughness of phosphorus steel is attributed to solid solution strengthening and segregation of phosphorus to grain boundaries. Due to superior corrosion resistance, copper–phosphorus TMT rebar is a candidate material in the construction sector.

    • Author Affiliations


      Bimal Kumar Panigrahi1 Surendra Kumar Jain2

      1. R&D Centre for Iron and Steel, Steel Authority of India Limited, Ranchi 834 002, India
      2. Steel Authority of India Ltd., Bhilai Steel Plant, Bhilai 490 001, India
    • Dates

  • Bulletin of Materials Science | News

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      Posted on July 25, 2019

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