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A 3D printed tensile testing system for micro-scale specimens.

Won June Choi1, Christopher Rudolf2, Hamid Safari1

  • 1School for the Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, Arizona 85287, USA.

The Review of Scientific Instruments
|November 7, 2023
PubMed
Summary
This summary is machine-generated.

A novel 3D printed tensile testing system bridges the gap for micro-scale material characterization. This cost-effective device accurately measures mechanical properties of fine wires, offering an accessible solution for intermediate-scale specimens.

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Additive Manufacturing

Background:

  • Characterizing micro-scale materials (films, wires <20 µm) often requires expensive, specialized equipment.
  • A technology gap exists for reliable, cost-effective testing of intermediate-scale specimens (tens of micrometers).
  • Conventional tensile testers are designed for larger scales (>1N) or micro/nano scales (<10 mN).

Purpose of the Study:

  • To introduce a cost-effective, all-in-one tensile testing system for micro-scale materials.
  • To address the technology gap in mechanical property characterization for intermediate-scale specimens.
  • To demonstrate the system's capability using fine copper wires.

Main Methods:

  • Development of a 3D printed tensile tester with integrated force sensing and self-aligning mechanisms.
  • Utilizing 3D printing to tailor force measurement (0.001-1 N) and displacement ranges.
  • Finite element simulation to identify and mitigate measurement errors through design modification.
  • Proof-of-concept testing on fine copper (Cu) wires (10-25 µm diameter).

Main Results:

  • The 3D printed tensile tester successfully characterized copper wires with 10-25 µm diameters.
  • Measured mechanical properties of the fine wires closely matched known values for bulk copper.
  • Finite element analysis identified and design modifications addressed key sources of measurement error.
  • The system demonstrated a force measurement range of 0.001-1 N and adjustable displacement.

Conclusions:

  • The proposed 3D printed tensile testing system provides a cost-efficient and accessible method for accurate mechanical characterization.
  • It effectively bridges the gap for testing specimens with cross-sectional dimensions in the tens of micrometers.
  • This technology enables reliable mechanical property assessment of micro-scale material systems.