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Evolution of Dislocation Density During Tensile Deformation of BH220 Steel at Different Pre-strain Conditions

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Abstract

Tensile behavior of BH220 steel with different pre-strain conditions (2 and 8%) followed by bake hardening was studied at different strain rates (0.001 and 0.1/s). Dislocation densities of the deformed specimens were successfully estimated from x-ray diffraction profile analysis using the modified Williamson-Hall equation. The results indicate that other than 2% pre-strain the dislocation density increases with increase in pre-strain level as well as with strain rate. The decrease in the dislocation density in 2% pre-strain condition without any drop in strength value is attributed to the characteristic dislocation feature formed during pre-straining.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, National Institute of Technology, Rourkela, 769008, India

    Prem Prakash Seth, A. Basu & K. Dutta

  2. MST Division, National Metallurgical Laboratory, Jamshedpur, 831007, India

    A. Das, H. N. Bar & S. Sivaprasad

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  1. Prem Prakash Seth
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  2. A. Das
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  3. H. N. Bar
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  4. S. Sivaprasad
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  5. A. Basu
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  6. K. Dutta
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Correspondence to A. Basu.

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Seth, P.P., Das, A., Bar, H.N. et al. Evolution of Dislocation Density During Tensile Deformation of BH220 Steel at Different Pre-strain Conditions. J. of Materi Eng and Perform 24, 2779–2783 (2015). https://doi.org/10.1007/s11665-015-1554-6

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  • DOI: https://doi.org/10.1007/s11665-015-1554-6

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