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Standard method for microCT-based additive manufacturing quality control 3: Surface roughness.

Anton du Plessis1, Philip Sperling2, Andre Beerlink2

  • 1CT Scanner Facility, Stellenbosch University, Stellenbosch, South Africa.

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|October 9, 2018
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Summary
This summary is machine-generated.

Micro-computed tomography (microCT) can analyze the internal density and porosity of additively manufactured (AM) samples. This technique also enables surface roughness analysis, offering a comprehensive evaluation of AM materials and processes.

Keywords:
Additive manufacturingMicroCTNondestructive testingQuality controlSurface roughnessX-ray tomography

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Area of Science:

  • Materials Science
  • Additive Manufacturing
  • Metrology

Background:

  • Traditional surface roughness measurements face challenges with complex, rough surfaces common in additive manufacturing (AM).
  • Micro-computed tomography (microCT) offers a non-destructive method for internal sample analysis, including density and porosity.

Purpose of the Study:

  • To demonstrate a workflow for utilizing microCT scan data for surface roughness analysis of AM coupon samples.
  • To compare microCT-derived surface roughness data with traditional tactile probe measurements.
  • To assess the potential of microCT for evaluating AM process parameters and materials.

Main Methods:

  • Micro-computed tomography (microCT) scanning of 10 mm coupon samples produced by additive manufacturing.
  • Acquisition of internal density and porosity data from microCT scans.
  • Generation of surface roughness parameters from the same microCT scan data.
  • Comparison of microCT-based surface roughness results with tactile probe measurements from the same sample areas.

Main Results:

  • MicroCT successfully provided mean density and detailed porosity information for the interior of AM samples.
  • Surface roughness analysis of as-built surfaces was achievable using the same microCT scan data.
  • The study demonstrated a comparable workflow for surface roughness assessment using microCT.
  • Results showed potential for microCT to analyze complex AM surfaces, complementing traditional methods.

Conclusions:

  • MicroCT is a versatile tool for characterizing both internal and external features of additively manufactured parts.
  • This technique can aid in comparing different AM process parameters and materials through detailed surface and internal analyses.
  • The application of microCT for surface roughness analysis is promising, especially for complex geometries where traditional methods are limited.