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Effect of Severe Plastic Deformation on Microstructural and Mechanical Properties of Structural Steel IS2062

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Abstract

The microstructural and mechanical properties of structural steel (Hypoeutectoid steel) processed by equal channel angular pressing (ECAP), up to four passes, at room temperature with rounded 1200 channel angle ECAP pressing die was studied. The grain refinement and grain size distribution were analyzed using electron backscatter diffraction. Mechanical properties such as microhardness, yield strength, ultimate tensile strength, and strain hardening exponent were experimentally determined and correlated with the microstructure. With the increased number of ECAP passes, an improvement in strength was observed and ductility decreased due to work hardening. The change in morphology, such as grain refinement and increased high angle disorientation boundaries with dislocation density contribute to strengthening. TEM analysis confirmed the dislocation structure in deformed samples.

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Acknowledgements

The authors are thankful to the Director, National Institute of Technology, Tiruchirappalli (NITT) for providing the Sophisticated Instrumentation Facility (SIF) for carrying out this research investigation. The authors additionally acknowledge Prof. Indradev S. Samajdar, Head, National Facility for Orientation Image Microscopy, Indian Institute of Technology Bombay, India for EBSD analysis.

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  1. Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu, 620015, India

    M. Nagaraj & B. Ravisankar

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  1. M. Nagaraj
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  2. B. Ravisankar
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Correspondence to M. Nagaraj.

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Nagaraj, M., Ravisankar, B. Effect of Severe Plastic Deformation on Microstructural and Mechanical Properties of Structural Steel IS2062. Trans Indian Inst Met 71, 2315–2323 (2018). https://doi.org/10.1007/s12666-018-1363-3

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