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Re-interpreting alloys for additive manufacturing

September 6th, 2018

The alloys used nowadays for additive manufacturing (AM) are mostly based on compositions inherited from conventional production techniques. The strong anisotropy exhibited by metals that solidify with cubic fcc or bcc primary phases (e.g. conventional compositions of Ni- or Ti-based alloys) represents a deep-rooted drawback during AM, where thermo-mechanical processing for microstructural engineering is not possible in near net-shape fabrication.

Investigating the binary system Ti-La we discovered a phase transformation path that opens up an alternative to avoid the typical coarse anisotropic microstructures obtained upon additive manufacturing of titanium alloys and provides new windows for the alloy design of other metallic systems.

Link to the Open Access publication.

 

 Typical epitaxially grown microstructure (left) and our approach to obtain equiaxed microstructures (right)
zum Bild Typical epitaxially grown microstructure (left) and our approach to obtain equiaxed microstructures (right)

 


Contact
Dr. Pere Barriobero Vila
German Aerospace Center

Institute of Materials Research
, Mechanics of materials and joining technology
Köln

Tel.: +49 2203 601-3873

Univ.-Prof. Dr. techn. Guillermo Requena
Head of Department

Institute of Materials Research
, Metallic Structures and Hybrid Material Systems
Cologne

Tel.: +49 2203 601-4418

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