High speed synchrotron x-ray phase contrast imaging of dynamic material response to split Hopkinson bar loading

Area of Science:

• Materials Science
• Physics
• Engineering

Background:

• High-rate material deformation studies require advanced imaging.
• Existing methods have limitations in temporal and spatial resolution.

Purpose of the Study:

• To integrate time-resolved imaging with high-rate loading apparatus.
• To demonstrate the effectiveness of this combined system for dynamic material analysis.

Main Methods:

• Utilized Advanced Photon Source beamline 32ID-B for time-resolved imaging.
• Employed split Hopkinson (Kolsky) bar apparatus for high-rate loading.
• Performed synchrotron X-ray phase contrast imaging on various material systems.

Main Results:

• Achieved 0.5 μs temporal and μm-level spatial resolution during dynamic experiments.
• Successfully imaged phenomena like sand particle interaction, glass cracking, fiber-epoxy failure, bone debonding, and silicon fragmentation.
• Demonstrated in situ analysis of internal material behavior under dynamic loading.

Conclusions:

• The amalgamation of time-resolved imaging and Kolsky bar apparatus is effective.
• This technique enables detailed in situ analysis of material failure under high-rate loading.
• The system has broad applicability across various scientific and engineering fields.