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Analysis of Significant Parameters Influencing Formability of Titanium Alloy by Using Over all Evaluation Criteria and New Matrix Model Based on Taguchi Method

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Abstract

In this study indigenously developed Titan 31, has been hot rolled under alpha–beta process at elevated temperatures with heavy reduction and heat treated at different temperatures with different heat treatment processes to obtain microstructure which is conducive for formability. The uniformly distributed, globular and very fine micro structure has been obtained at finally rolled, and annealed at 800 °C. ANOVA analysis has been carried out to analyze parameters influencing formability on the basis of results obtained from tensile tests in plane strain at different elevated temperatures, at different cross head speeds and different angles to rolling as per Taguchi design of experiment, for anisotropy value, exponent of hardening and percentage elongation. A new matrix model has been developed to optimize formability parameters. The results obtained from new matrix model have been analyzed with results of Taguchi overall evaluation criteria considering combined effect of anisotropy value, exponent of hardening and percentage elongation. The optimized value from new matrix model are temperature 718 °C, crosshead speed 1.0 mm per min (0.00066 per second), angle to rolling to which specimen tested is 44.9° and that of Taguchi overall evaluation criteria temperature 725 °C, crosshead speed (0.0005 per second), angle to rolling to which specimen tested is 45° among all factors selected in the study.

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Acknowledgments

Author acknowledges to Dr T Mohandas retired scientist “G” DMRL Hyderabad for consistent support and Dr R Roy for providing Qualitek 4 software.

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Authors and Affiliations

  1. Department of Mechanical Engineering, JBIET, Hyderabad, 500075, Yenkapally, Moinabad Mandal R.R. District, AP, India

    Anoop Kumar Shukla

  2. Near Net Shape Group, Aeronautical Material Division, Defence Metallurgical Research Laboratory, Hyderabad, AP, India

    T. Raghu & I. Balasundar

  3. CRV Institute of Technology & Sciences, Hyderabad, Shamirpet RR District, AP, India

    S. Rajesham

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  1. Anoop Kumar Shukla
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  2. T. Raghu
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  3. S. Rajesham
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  4. I. Balasundar
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Correspondence to Anoop Kumar Shukla.

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Shukla, A.K., Raghu, T., Rajesham, S. et al. Analysis of Significant Parameters Influencing Formability of Titanium Alloy by Using Over all Evaluation Criteria and New Matrix Model Based on Taguchi Method. Trans Indian Inst Met 67, 721–730 (2014). https://doi.org/10.1007/s12666-014-0378-7

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  • DOI: https://doi.org/10.1007/s12666-014-0378-7

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