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Computed Tomography

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Comparison of results for numerical simulations of castings with xray computed Tomography reconstructions

Task

The results of numerical simulation of solidifying industrial casting are compared to results of x-ray computed tomography reconstruction of the same part. The topic of the present work is a comparison between the predicted and the actual porosity in the casting.

Equipment

MAGMASOFT - MAGMA GMBH

  • Foundry Simulation Software
  • Version 4.4 + HPDC – Module
  • Casting: Al Si9Cu3(Fe)
  • Initial Temperature: 640°C
  • Mold: X38CrMoV51
  • Initial Temperature: 180°C
  • Model: 20 million elements

V|TOME|X C - PHOENIX|X-RAY  

  • 3D CT-System
  • 240 kV Microfocus X-ray Tube
  • Focus 4 – 200 μm
  • 16 Bit Flat Panel Detector
  • 512 x 512 Pixel Resolution (3 fold ext.)
  • Voxel Size: 244 μm³
  • Volume Size: 820 x 760 x 493 Pixel

Conclusion

The position of porosity detected by x-ray computed tomography in the presented casting agrees well with predictions by numerical simulation of a high probability of porosity due to lack of feeding in the last solidifying regions.