What Makes AlCoCrFeNi2.1 High-Entropy Alloy Powder a Breakthrough in Thermal Structural Design

High-entropy alloys (HEAs) have revolutionized material science with their unique phase stability and mechanical strength. Among them, AlCoCrFeNi2.1 stands out for its outstanding high-temperature strength, oxidation resistance, and promising performance in additive manufacturing.

Unique Composition, Balanced Performance

AlCoCrFeNi2.1 is a multi-principal element alloy where Ni content is enriched to 2.1 (molar ratio), forming a stable dual-phase BCC and FCC structure. This enables:

• High-temperature strength retention above 800°C

• Enhanced hardness and wear resistance

• Excellent phase stability across thermal cycling

These properties make it ideal for applications exposed to fluctuating thermal and mechanical stress.

Excellent Oxidation and Corrosion Resistance

Due to its complex elemental synergy, this alloy naturally forms a dense, protective oxide film that offers:

• Superior oxidation resistance in air and vacuum

• Good resistance to sulfidation and carburization

• Reliable surface integrity at elevated temperatures

AlCoCrFeNi2.1 is especially suited for aerospace, turbine, and thermal barrier applications.

Optimized for Additive Manufacturing

HUAXIAO TECH produces AlCoCrFeNi2.1 powder through controlled gas atomization, providing:

• Spherical particles with low satellite formation

• High powder flowability and packing density

• Compatibility with laser powder bed fusion (LPBF) and EBM

It delivers excellent printability with minimal cracking, even under rapid cooling conditions.

Common Application Areas

• Turbine blades and vanes

• Rocket engine liners

• High-strength heat exchangers

• Wear-resistant structural components

Key Advantages

• High thermal stability and structural strength

• Outstanding oxidation and corrosion resistance

• Superior print quality in AM processes

• Excellent toughness-to-strength ratio

Frequently Asked Questions (FAQ)

Q1: What is the difference between AlCoCrFeNi and AlCoCrFeNi2.1?
A1: AlCoCrFeNi2.1 has a higher Ni content, resulting in a more stable dual-phase microstructure and better thermal stability.

Q2: Is this alloy powder compatible with all AM platforms?
A2: Yes, it is suitable for LPBF, EBM, and directed energy deposition (DED), with excellent dimensional control.

Q3: What is the typical particle size range?
A3: D50 ranges from 15–53 μm for AM use; finer or coarser distributions can be customized on request.

Conclusion

AlCoCrFeNi2.1 high-entropy alloy powder provides a unique combination of strength, thermal resistance, and AM adaptability. It is a powerful candidate for next-generation aerospace and energy systems requiring reliability in extreme environments.

For material consultation or customized grades, contact HUAXIAO TECH for technical support.