Bulletin of Materials Science

, Volume 25, Issue 4, pp 319–324 | Cite as

Impact toughness of high strength low alloy TMT reinforcement ribbed bar

  • Bimal Kumar Panigrahi
  • Surendra Kumar Jain


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.


Charpy impact toughness TMT rebar phosphorus ductile-brittle transition grain boundary segregation 


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Copyright information

© Indian Academy of Sciences 2002

Authors and Affiliations

  • Bimal Kumar Panigrahi
    • 1
  • Surendra Kumar Jain
    • 1
    • 2
  1. 1.R&D Centre for Iron and SteelSteel Authority of India LimitedRanchiIndia
  2. 2.†Steel Authority of India Ltd.Bhilai Steel PlantBhilaiIndia

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