We present a dynamic implementation of the beam-tracking x-ray imaging method providing absorption, phase, and ultrasmall angle scattering signals with microscopic resolution and high frame rate. We demonstrate the method’s ability to capture dynamic processes with 22-ms time resolution by investigating the melting of metals in laser additive manufacturing, which has so far been limited to single-modality synchrotron radiography. The simultaneous availability of three contrast channels enables earlier segmentation of droplets, tracking of powder dynamic, and estimation of unfused powder amounts, demonstrating that the method can provide additional information on melting processes.

中文翻译：

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动态多重对比 X 射线成像方法应用于增材制造

我们提出了一种动态实现的光束跟踪 X 射线成像方法，可提供具有微观分辨率和高帧速率的吸收、相位和超小角度散射信号。我们通过研究激光增材制造中金属的熔化，展示了该方法以 22 毫秒时间分辨率捕获动态过程的能力，迄今为止，激光增材制造仅限于单模态同步辐射成像。三个对比通道的同时可用性可以实现液滴的早期分割、粉末动态跟踪和未熔粉末量的估计，这表明该方法可以提供有关熔化过程的额外信息。