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The influence of copper addition on microstructure and mechanical properties of thermomechanically processed microalloyed steels

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Abstract

The present study concerns the influence of Cu addition on the microstructural evolution and mechanical properties of directly air-cooled microalloyed thin-gauge steel. For this purpose, 1.5 wt% Cu was added to a Ti–B microalloyed steel. It is known that Ni addition to Cu-containing steel is beneficial to eliminate hot shortness caused by Cu. Therefore, the effect of Ni addition (half that of Cu in wt%) on the microstructure formation and mechanical properties has also been studied. Microstructures and mechanical properties of the directly air-cooled steels have demonstrated that addition of 1.5 wt% Cu along with 0.8 wt% Ni in Ti–B microalloyed steel results in a dual phase-like microstructure, which yielded attractive tensile strength (746 MPa) and ductility (31%). However, Cu addition deteriorated the impact toughness of the directly air-cooled Ti–B microalloyed steels.

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Authors and Affiliations

  1. Department of Metallurgy and Materials Engineering, Bengal Engineering and Science University, Shibpur, Howrah, 711 103, India

    S. K. Ghosh & P. P. Chattopadhyay

  2. R & D Division, Tata Steel Limited, Jamshedpur, 831 001, India

    A. Haldar

Authors
  1. S. K. Ghosh
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  2. A. Haldar
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  3. P. P. Chattopadhyay
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Correspondence to S. K. Ghosh.

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Ghosh, S.K., Haldar, A. & Chattopadhyay, P.P. The influence of copper addition on microstructure and mechanical properties of thermomechanically processed microalloyed steels. J Mater Sci 44, 580–590 (2009). https://doi.org/10.1007/s10853-008-3051-x

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  • DOI: https://doi.org/10.1007/s10853-008-3051-x

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