Metals & Metal Matrix Composites

Materials Engineering

Technical Expertise

The following list provides a sample of EWI’s technical expertise in joining metals and metal matrix composites. Our organization’s proficiencies reach beyond what is listed below, as our in-house teams work together closely to provide the breadth of technical insight our partners need to succeed.

  • Assessment of the weldability of dissimilar materials and MMCs.
  • Evaluation of laser, arc welding, and solid-state working welded joints.
  • Material characterization using scan electron microscopy (SEM), Energy-Dispersive Spectroscopy (EDS), Electron Backscatter Diffraction (EBSD).
  • Weld, HAZ, and interlayer microstructural assessments.
  • Assessment of corrosion properties of similar and dissimilar metals and MMC joints
  • Evaluation of mechanical properties of metals and MMC joints.
  • Assessment of corrosion resistance of dissimilar metals and MMCs welded joints
  • Material analysis for carbon capture, utilization, and storage
  • Materials evaluation for hydrogen infrastructure

Equipment & Lab Resources


Laser Welding Systems:

  • Thin materials, low heat input:
    • 2 kW, IPG Ytterbium fiber laser, single mode
    • 1kW, nlight single mode
  • Thicker materials, larger spot sizes:
    • 20 kW, IPG Ytterbium fiber laser
    • 10 kW, Laser line diode laser
    • 6 kW, Trumpf Disk Laser
    • 4 kW, nlight Corona
    • 4 kW, Lumentum Core light laser

Solid State Systems

  • Capacitor Discharge Systems
  • GTC Accustir Friction Stir Weld
  • Friction stir spot welders
  • Inertia friction welders
  • Linear friction welder

EWI Evaluation Lab Equipment.

  • Metallographic preparation of specimens up to 6″
  • Optical microscopy
  • Digital stereomicroscopy, up to 2000X magnification – a bridge between light and scanning microscopy
  • OES chemistry
  • Micro/Macro hardness (Vickers, Rockwell, and Brinell)
  • Auto-hardness mapping up to 1000 indentations
  • Grain size measurement
  • Inclusion severity index
  • Ferrite counting either microscopically or nondestructive by using ferrite scope.

Engineering with Integrity Since 1984

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