Grain Boundary Analysis in Metals Using Atom Probe Tomography

The Challenge

Grain boundaries play a decisive role in shaping the functional properties of metals and alloys—governing strength, stability, corrosion resistance, and more. Yet, characterizing these critical regions at atomic resolution is extremely difficult. Traditional imaging techniques often miss the nanoscale chemical variations at grain boundaries—such as segregation or precipitation—that directly impact mechanical performance and structural integrity.

How Atom Probe Solved It

CAMECA’s Atom Probe Tomography (APT) offers a breakthrough: true 3D chemical analysis of grain boundaries at the atomic scale. Highlights include:

• Targeted FIB specimen preparation to extract grain boundary-containing wedges, enabling side-view APT analysis using microtip coupon carriers.
• 3D atomic reconstructions showing precise carbon atom maps in steel, revealing subtle segregation patterns.
• Grain boundary segregation insights, as seen in Ni–Mn alloys: APT captures carbon enrichment at grain boundaries and Mn-rich precipitates post-annealing.
• These insights empower materials scientists to better understand and control interface behavior, unlocking improvements in alloy design, thermal stability, and mechanical performance.

Experience Atom Probe Power

See how atomic-level clarity transforms grain boundary research with the CAMECA LEAP 6000XR—a cutting-edge APT system designed for advanced materials and metallurgical studies. ➡ Explore the LEAP 6000XR

➡Learn more about targeting grain boundaries for analysis: Technical note TN-09 and Application note APT-13