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增材制造Ti6Al4V晶体织构依赖的体各向异性弹性响应

Crystallographic texture dependent bulk anisotropic elastic response of additively manufactured Ti6Al4V.

作者信息

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

机构信息

Department of Materials Science and Engineering, University of North Texas, Denton, TX, 76207, USA.

Center for Agile and Adaptive Additive Manufacturing, University of North Texas, Denton, TX, 76207, USA.

出版信息

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

DOI:10.1038/s41598-020-80710-6
PMID:33437003
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7804281/
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.

摘要

与激光增材制造相关的快速热动力学在打印部件中产生强烈的整体晶体织构。本研究通过采用有效的体积模量弹性成像技术，并结合在材料内部以20MHz频率测量超声剪切波速度，确定了这种整体织构对激光粉末床熔融Ti6Al4V弹性各向异性的影响。该联合技术确定，在Ti6Al4V打印块的构建平面上，剪切波平面的45°和90°取向处，剪切速度从3322±20.12m/s显著衰减至3240±21.01m/s。相应地，在这些取向上，剪切模量从48.46±0.82GPa降低至46.40±0.88GPa。基于增材制造的Ti6Al4V中先前柱状β晶粒内β晶体变体的取向，对这种衰减进行了解释。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e00/7804281/c4e5bb918c39/41598_2020_80710_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e00/7804281/0cab5929000a/41598_2020_80710_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e00/7804281/037fda45925d/41598_2020_80710_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e00/7804281/2267f51c279d/41598_2020_80710_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e00/7804281/d4b90d271b45/41598_2020_80710_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e00/7804281/6e77a12ed89b/41598_2020_80710_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e00/7804281/c4e5bb918c39/41598_2020_80710_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e00/7804281/0cab5929000a/41598_2020_80710_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e00/7804281/037fda45925d/41598_2020_80710_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e00/7804281/2267f51c279d/41598_2020_80710_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e00/7804281/d4b90d271b45/41598_2020_80710_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e00/7804281/6e77a12ed89b/41598_2020_80710_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e00/7804281/c4e5bb918c39/41598_2020_80710_Fig6_HTML.jpg

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本文引用的文献

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