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  • 标题:Crystallographic texture dependent bulk anisotropic elastic response of additively manufactured Ti6Al4V
  • 本地全文:下载
  • 作者:Mangesh V. Pantawane ; Teng Yang ; Yuqi Jin
  • 期刊名称:Scientific Reports
  • 电子版ISSN:2045-2322
  • 出版年度:2021
  • 卷号:11
  • 期号:1
  • 页码:633
  • DOI:10.1038/s41598-020-80710-6
  • 出版社:Springer Nature
  • 摘要: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 $$^\circ$$ and 90 $$^\circ$$ 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 $$\alpha ^\prime$$ crystallographic variants within prior columnar $$\beta$$ grains in additively manufactured Ti6Al4V.
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