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  4. Properties of a TiAl turbocharger wheel produced by electron beam melting
 
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2014
Conference Paper
Title

Properties of a TiAl turbocharger wheel produced by electron beam melting

Abstract
Powder of alloy Ti-48Al-2Cr-2Nb was used to fabricate turbocharger wheel prototypes by electron beam melting. This additive manufacturing technology uses an electron beam to generate parts by selectively melting the powder in a layer-by-layer way based on CAD data. The parts were fully densified with only minor percentages of build flaws. A loss of Al of about 1.4 wt% is observed, while the levels of impurities are comparable between the powder and the part. Furthermore, the microstructure was investigated after EBM and after EBM + heat treatment. It is characterized by equiaxed grains after EBM. An additional heat treatment transformed this microstructure into a fully lamellar one showing that the microstructure was homogenized.
Author(s)
Biamino, S.
Klöden, B.
Weißgärber, T.
Kieback, B.
Ackelid, U.
Mainwork
DDMC 2014, Fraunhofer Direct Digital Manufacturing Conference. Proceedings  
Conference
Direct Digital Manufacturing Conference (DDMC) 2014  
Language
English
Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM  
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