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, S. Srinivasan, Rajarshi Banerjee, Arup Neogi, Narendra B. Dahotre
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.