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Microstructure, Texture, and Mechanical Properties of Ti6Al4V Alloy during Uniaxial Tension at Elevated Temperatures

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Abstract

In the present study, the microstructure, texture and mechanical properties of Ti6Al4V (Ti64) alloy during deformation at low temperatures (i.e., around its service temperature in aerospace applications) have been investigated. The samples were subjected to uniaxial tension at temperatures of 298, 673, and 873 K for different % elongations. Refinement of both α and β grains was observed during deformation at all the studied temperatures. The α-grain refinement was identified to be of continuous dynamic recovery and recrystallization (CDRR) type. It was also found that the Burgers orientation relationship (BOR) between α and β grains refined the β grains, whereas any deviation from the relationship refined the α grains. The basal texture was observed to be tilted about 10-50° away from the normal direction (ND) of the samples after deformation. Stage III hardening was observed in the samples during deformation at all the studied temperatures. Athermal hardening was seen up to 4% deformation of the samples at a temperature of 673 K. Further, the athermal hardening rate was found to be more at 673 K deformation temperature as compared to those at 298 and 873 K due to higher activity of basal slip system at 673 K.

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Acknowledgment

The authors thank Prof. S. Suwas, Dept. of Materials Engg., IISc Bangalore, for conducting tension tests of the samples in his Dept. The authors also thank Prof. I. Samajdar for conducting EBSD measurements of the samples in his laboratory, National Facility on OIM and Texture, Dept. of Metallurgical Engg. and Materials Science, IIT Bombay, Powai, Mumbai.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, NIT Rourkela, Rourkela, 769008, India

    R. Vinjamuri, B. D. Bishoyi, M. Kumar & S. K. Sahoo

  2. School of Minerals, Metallurgical and Materials Engineering, IIT Bhubaneswar, Bhubaneswar, 752050, India

    R. K. Sabat

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  1. R. Vinjamuri
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Vinjamuri, R., Bishoyi, B.D., Sabat, R.K. et al. Microstructure, Texture, and Mechanical Properties of Ti6Al4V Alloy during Uniaxial Tension at Elevated Temperatures. J. of Materi Eng and Perform 32, 5097–5108 (2023). https://doi.org/10.1007/s11665-022-07454-4

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