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首页> 外文会议>American Society for Nondestructive Testing(ASNT) Fall Conference amp; Quality Testing Show: Paper Summaries; 20041115-19; Las Vegas,NV(US) >3D VISUALIZATION ANALYSIS OF IMPACT DAMAGE IN Ti-6Al-4V WITH X-RAY COMPUTED TOMOGRAPHY
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3D VISUALIZATION ANALYSIS OF IMPACT DAMAGE IN Ti-6Al-4V WITH X-RAY COMPUTED TOMOGRAPHY

机译：X射线计算机断层摄影术对Ti-6Al-4V冲击损伤的3D可视化和分析

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摘要

The in situ volumetric internal damage of a monolithic Ti-6Al-4V alloy ballistic target was evaluated using industrial x-ray computed tomography, XCT. The evaluation was conducted with individual XCT scans of ～0.5 mm thickness to reveal 3D volumetric damage larger than the minimum feature resolution limit (> 0.25 mm). Image processing and visualization techniques included contiguous 2D scan sequencing, reconstructed 3D solid object and virtual sectioning, and variable transparency point cloud imaging which more clearly permits the visualization of the volumetric damage network isolated from the Ti-6Al-4V host material. Also, results of quantifying the volumetric axi-symmetric damage fraction are introduced. Observed damage features include multiple meso-scale cracks and voids. Of particular interest is the unique and distinct meso-scale cracking morphology, described herein as "spiral orbital cracking", located beyond the penetration cavity in the exit half of the sample. No known ballistic damage model appears capable of predicting this observed damage morphology to date.
机译：使用工业X射线计算机断层扫描XCT评估了整体式Ti-6Al-4V合金弹道靶的原位体积内部损伤。评估使用约0.5 mm厚的XCT进行，以显示大于最小特征分辨率极限（> 0.25 mm）的3D体积损伤。图像处理和可视化技术包括连续的2D扫描序列，重建的3D固体对象和虚拟切片以及可变透明度的点云成像，这更清楚地允许可视化与Ti-6Al-4V主体材料隔离的体积损伤网络。此外，介绍了量化体积轴对称损伤分数的结果。观察到的损坏特征包括多个中尺度的裂纹和空隙。特别令人感兴趣的是独特而独特的中尺度裂纹形态，在本文中称为“螺旋轨道裂纹”，位于样品出口一半的穿透腔之外。迄今为止，没有已知的弹道伤害模型能够预测这种观察到的伤害形态。

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