Influence of Large Strain Hot Deformation on Microstructural Evolution in Alloy D9

Abstract

In this work, a Ti-modified austenitic stainless steel used in the core of fast reactors is subjected to large strain deformation. The steel is deformed to 200% effective strain through high-temperature torsional loading in temperature domain 1173–1473 K. Three strain rates, namely 0.01 s−1, 0.1 s−1 and 1 s−1, are used for this deformation, so that the combined effect of deformation temperature and strain rate on material response can be studied. The torsional loading conditions are correlated with microstructural mechanisms of work hardening, dynamic recrystallisation (DRX) and post-DRX grain growth, each of which are found to bear a different relation with processing parameters. The microstructural response to this thermo-mechanical treatment is contrasted with the response to a heat treatment that involves equivalent exposure to high temperature. It is found that the steel is amenable to large strain hot deformation, and a variety of microstructures can be generated through control of the hot deformation parameters.

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References

  1. 1.

    ASTM E209-18, Standard Practice for Compression Tests of Metallic Materials at Elevated Temperatures with Conventional or Rapid Heating Rates and Strain Rates, ASTM International, West Conshohocken, PA (2018).

  2. 2.

    Semiatin S L, and Dieter G E, in Handbook of Workability and Process Design, (eds) Dieter G E, Kuhn H A, Semiatin S L, ASM International, Materials Park, OH (2013).

    Google Scholar 

  3. 3.

    Nadai A, Theory of Flow and Fracture, Vol 1, 2nd ed., McGraw-Hill, New York (1950) p 349.

    Google Scholar 

  4. 4.

    Fields D S, and Backofen W A, Proc Am Soc Test Mater57 (1957) 1259.

    Google Scholar 

  5. 5.

    Aashranth B, Samantaray D, Kumar S, Dasgupta A, Borah U, Albert S K, and Bhaduri A K, J Mater Eng Perform26 (2017) 3531.

    CAS  Article  Google Scholar 

  6. 6.

    Aashranth B, Samantaray D, Davinci M A, Murugesan S, Borah U, Albert S K, and Bhaduri A K, Mater Character136 (2018) 100.

    CAS  Article  Google Scholar 

  7. 7.

    Evans R W, in Encyclopedia of Materials: Science and Technology, (eds) Jurgen Buschow K H, Cahn R W, Flemings M C, Ilschner B, Kramer E J, Mahajan S, and Veyssiere P, Elsevier, Amsterdam (2001).

  8. 8.

    Khoddam S, Lam Y C, and Thomson P F, Steel Res, 66 (1995) 45.

    CAS  Article  Google Scholar 

  9. 9.

    Khoddam S, Lam Y C, and Thomson P F, J Test Eval26 (1998) 157.

    CAS  Article  Google Scholar 

  10. 10.

    Khoddam S, and Hodgson P D, J Mater Proc Technol153–154 (2004) 839.

    Article  Google Scholar 

  11. 11.

    Aashranth B, Davinci M A, Samantaray D, Borah U, and Albert S K, Mater Des116 (2017) 495.

    CAS  Article  Google Scholar 

  12. 12.

    Beladi H, Cizek P, and Hodgson P D, Scr Mater62 (2010) 191.

    CAS  Article  Google Scholar 

  13. 13.

    He G, Liu F, Huang L, Huang Z, and Jiang L, J Alloys Compd701 (2017) 909.

    CAS  Article  Google Scholar 

Download references

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Correspondence to Dipti Samantaray.

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Davinci, M.A., Aashranth, B., Samantaray, D. et al. Influence of Large Strain Hot Deformation on Microstructural Evolution in Alloy D9. Trans Indian Inst Met 73, 1637–1643 (2020). https://doi.org/10.1007/s12666-020-01955-3

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Keywords

  • Torsion
  • Hot deformation
  • Stainless steel
  • Microstructure