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Effects of Temporary Alloying and Severe Plastic Deformation on Microstructure Evolution and Mechanical Properties of Ti-Alloys: A Comparative Study

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Abstract

Near-α (VT 20) and α + β (Ti–6Al–4V) Ti alloys having similar initial grain morphology with equiaxed α in transformed β were subjected to microstructure refinement processes by thermohydrogen processing (THP) and caliber rolling (CR), respectively. The microstructure analysis after THP and CR of the alloys revealed the change in morphology and refinement of microstructure. The microstructure analysis after initial constant strain rate tests at 850 °C exhibited needle-like morphology for THP alloy, whereas it was equiaxed for as-received VT 20 and CR 750 alloy. An additional attempt was made on the CR alloy towards determining the magnitudes of strain rate sensitivity index (m) through differential strain rate test conducted over a number of strain rate change cycles at 850 °C and 927 °C. Both THP and CR processes resulted in grain refinement and the change in morphology of microstructure.

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Authors and Affiliations

  1. School of Mechanical Engineering, REVA University, Bengaluru, 560064, India

    S. M. Jagadeesh Babu

  2. Special Materials Division, Vikram Sarabhai Space Center, ISRO, Trivandrum, 695022, India

    S. V. S. Narayana Murty

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

    N. Prabhu

  4. Mechanical Metallurgy Division, Bhabha Atomic Research Centre, Anushaktinagar, Mumbai, 400085, India

    R. Kapoor & R. N. Singh

  5. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Jodhpur, Karwar, 342037, India

    B. P. Kashyap

Authors
  1. S. M. Jagadeesh Babu
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  2. S. V. S. Narayana Murty
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  3. N. Prabhu
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  4. R. Kapoor
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  5. R. N. Singh
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  6. B. P. Kashyap
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Correspondence to S. M. Jagadeesh Babu.

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Jagadeesh Babu, S.M., Narayana Murty, S.V.S., Prabhu, N. et al. Effects of Temporary Alloying and Severe Plastic Deformation on Microstructure Evolution and Mechanical Properties of Ti-Alloys: A Comparative Study. Trans Indian Inst Met 72, 1421–1425 (2019). https://doi.org/10.1007/s12666-019-01594-3

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  • DOI: https://doi.org/10.1007/s12666-019-01594-3

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