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Microstructure and Property Evolution for Hot-Rolled and Cold-Rolled Austenitic Stainless Steel 316L

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Abstract

Grain boundary character distribution plays an important role in determining the functional and mechanical properties of polycrystalline materials. The aim of this work was to achieve improved coincident site lattice (CSL) fraction without increasing low angle grain boundary (LAGB) proportion. We utilized single-step thermo-mechanical processing route involving rolling followed by short heat treatment and compared the effect of rolling temperature. Our results indicated that rolling at elevated temperature led to significant increase in the fraction of special boundaries while keeping the fraction of LAGB very low, as desired. We conducted thermal stability of our sample-conditions at elevated temperatures for various lengths of time and found the microstructure of the samples to be stable up to 1000 °C. This study showed that even commercially suitable process (single step processing with short heat treatment duration) could lead to microstructure with considerable increase in CSL boundaries fraction, improved hardness values and good thermal stability.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India

    Nitin Kumar Sharma & Shashank Shekhar

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  1. Nitin Kumar Sharma
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  2. Shashank Shekhar
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Correspondence to Shashank Shekhar.

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Sharma, N.K., Shekhar, S. Microstructure and Property Evolution for Hot-Rolled and Cold-Rolled Austenitic Stainless Steel 316L. Trans Indian Inst Met 70, 1277–1284 (2017). https://doi.org/10.1007/s12666-016-0926-4

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  • DOI: https://doi.org/10.1007/s12666-016-0926-4

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