Crystallographic texture dependent bulk anisotropic elastic response of additively manufactured Ti6Al4V

Mangesh V Pantawane; Teng Yang; Yuqi Jin; Sameehan S Joshi; Sriswaroop Dasari; Abhishek Sharma; Arkadii Krokhin; Srivilliputhur G Srinivasan; Rajarshi Banerjee; Arup Neogi; Narendra B Dahotre

doi:10.1038/s41598-020-80710-6

Crystallographic texture dependent bulk anisotropic elastic response of additively manufactured Ti6Al4V

Sci Rep. 2021 Jan 12;11(1):633. doi: 10.1038/s41598-020-80710-6.

Authors

Mangesh V Pantawane^{1

2}, Teng Yang^{3

2}, Yuqi Jin³, Sameehan S Joshi^{1

2}, Sriswaroop Dasari¹, Abhishek Sharma¹, Arkadii Krokhin³, Srivilliputhur G Srinivasan¹, Rajarshi Banerjee^{1

2}, Arup Neogi^{3

2}, Narendra B Dahotre^{4

5}

Affiliations

¹ Department of Materials Science and Engineering, University of North Texas, Denton, TX, 76207, USA.
² Center for Agile and Adaptive Additive Manufacturing, University of North Texas, Denton, TX, 76207, USA.
³ Department of Physics, University of North Texas, Denton, TX, 76203, USA.
⁴ Department of Materials Science and Engineering, University of North Texas, Denton, TX, 76207, USA. narendra.dahotre@unt.edu.
⁵ Center for Agile and Adaptive Additive Manufacturing, University of North Texas, Denton, TX, 76207, USA. narendra.dahotre@unt.edu.

Abstract

Rapid thermokinetics associated with laser-based additive manufacturing produces strong bulk crystallographic texture in the printed component. The present study identifies such a bulk texture effect on elastic anisotropy in laser powder bed fused Ti6Al4V by employing an effective bulk modulus elastography technique coupled with ultrasound shear wave velocity measurement at a frequency of 20 MHz inside the material. The combined technique identified significant attenuation of shear velocity from 3322 ± 20.12 to 3240 ± 21.01 m/s at 45[Formula: see text] and 90[Formula: see text] orientations of shear wave plane with respect to the build plane of printed block of Ti6Al4V. Correspondingly, the reduction in shear modulus from 48.46 ± 0.82 to 46.40 ± 0.88 GPa was obtained at these orientations. Such attenuation is rationalized based on the orientations of [Formula: see text] crystallographic variants within prior columnar [Formula: see text] grains in additively manufactured Ti6Al4V.