NANOSCALE CONTROL FOR MACROSCALE PERFORMANCE

  • HRL has enabled a new class of 3D-printable high-strength aluminum alloys (Al 7A77.60L) built off the historically high-strength and low-cost wrought alloy systems. High-strength wrought 7000 and 2000 series aluminum alloys have been used for decades and are critical to many products from aircraft to sporting goods. These alloys are known for strength and low-cost alloying additions (e.g., Zn, Mg, and Cu) but have not been successfully 3D-printable.
  • Additive manufacturing enables complete design freedom and performance optimization through increased functionality, lower weight, and reduced complexity and part counts in assemblies.
  • HRL’s system combines the performance, industrial acceptance, and cost benefits of high-strength alloys with the freedom of additive manufacturing by leveraging low-cost alloying elements (e.g., Zn, Mg, and Cu) to strengthen the material with targeted grain refiners that control solidification for additive manufacturing without cracking issues.
  • This breakthrough is the first time inherent performance, cost, and scale advantages of industrially relevant, wrought aluminum alloys are available with the design freedom of additive manufacturing.
MATR

3D PRINTED ALUMINUM 7A77.60L

HEAT TREATED MATERIAL PROPERTIES 1,2 Metric Imperial
Yield Strength 490 - 520 MPa 71 - 75 ksi
Ultimate Tensile Strength 520 - 580 MPa 75 - 84 ksi
Elongation 6 - 14%
1 Tensile testing completed in accordance with ASTM E8
2 Ranges depend on processing parameters and post build HIP and heat treatment conditions
POWDER SIZES
Available Powder D50 values ranging from 20 to 65 μm.
Material Composition
MATERIAL COMPOSITION (WT%)
Aluminum Balance
Chromium < 0.1%
Copper 1.1 - 2.1%
Magnesium 1.8 - 2.9%
Zinc 4.5 - 6.1%
Zirconium 0.5 - 2.8%
Trace Elements < 0.15%

The information on this page is believed to be accurate, however, no guarantee of its accuracy is made. The information set forth in the sheet is not intended to be a warranty, either expressed or implied, and any warranty accompanying any sale must be set forth in separate documents.

To place an order for any of these products, contact HRL Laboratories via e-mail at additive[at]hrl.com or call (310) 317-5999.