Ut-battelle, Inc.

Iowa State University Research Foundation, Inc.

University of Tennessee Research Foundation

Eck Industries, Inc.

Niyanth Sridharan

Orlando Rios

David J Weiss

Hunter B Henderson

Zachary C Sims

Ryan T Ott

Ryan Dehoff

Sudarsanam Suresh Babu

Alex J Plotkowski

Described herein are additive manufacturing methods and products made using such methods. The alloy compositions described herein are specifically selected for the additive manufacturing methods and provide products that exhibit superior mechanical properties as compared to their cast counterparts. Using the compositions and methods described herein, products that do not exhibit substantial coarsening, such as at elevated temperatures, can be obtained. The products further exhibit uniform microstructures along the print axis, thus contributing to improved strength and performance. Additives also can be used in the alloys described herein.

Additive manufacturing methods using aluminum-rare earth alloys and products made using such methods

Embodiments of surface-hardened aluminum-rare earth alloys and methods of making the alloys are disclosed. In some embodiments, the alloy comprises aluminum and 4 wt % to 60 wt % of a rare earth component X having a maximum solid solubility of &#x2264;0.5 wt % in aluminum. The surface-hardened alloy component has an alloy bulk portion and a hardened alloy surface portion. At least a portion of the hardened alloy surface portion has a Vickers hardness that is at least 30% greater than a Vickers hardness of the alloy bulk portion.

Surface-hardened aluminum-rare earth alloys and methods of making the same

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Oak Ridge, TN, United States of America

Niyanth Sridharan