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Effect of Preaging Deformation on Aging Characteristics of 2507 Super Duplex Stainless Steel

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Abstract

In the present study, precipitation of sigma (σ) phase was investigated over the temperature range of 700-850 °C in undeformed and deformed (60% cold rolling) samples of 2507 super duplex stainless steel. The fraction of sigma phase formed as a result of the transformation α → σ + γ2 increases with increasing time and temperature. The increase in sigma phase leads to increase in yield strength and decrease in ductility. Preaging deformation leads to accelerated precipitation of sigma phase. The activation energy for sigma phase precipitation in deformed sample is found to be lower than that in undeformed sample.

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Acknowledgments

We would like to thank the Department of Science and Technology, India, for funding under FIST program SR/FST/ETII-054/2000 for purchase of Universal Testing Machine.

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Authors and Affiliations

  1. Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Bombay, Mumbai, 400076, India

    M. K. Mishra, A. G. Rao, B. P. Kashyap & N. Prabhu

  2. Research and Development, Tata Steel Limited, Jamshedpur, 831001, India

    R. Sarkar

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  1. M. K. Mishra
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  2. A. G. Rao
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  3. R. Sarkar
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  4. B. P. Kashyap
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Correspondence to M. K. Mishra.

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Mishra, M.K., Rao, A.G., Sarkar, R. et al. Effect of Preaging Deformation on Aging Characteristics of 2507 Super Duplex Stainless Steel. J. of Materi Eng and Perform 25, 374–381 (2016). https://doi.org/10.1007/s11665-015-1840-3

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  • DOI: https://doi.org/10.1007/s11665-015-1840-3

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