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Uncertainty of additive manufactured Ti-6Al-4V: Chemical composition, microstructure and mechanical properties

: Greitemeier, Daniel; Dalle Donne, Claudio; Schoberth, Achim; Jürgens, Michael; Eufinger, Jens; Melz, Tobias


Petz, P.F.:
Uncertainty in mechanical engineering II : Selected, peer reviewed papers from the 2nd International Conference on Uncertainty in Mechanical Engineering (ICUME 2015), November 19-20, 2015, Darmstadt, Germany
Pfaffikon: TTP, 2015 (Applied mechanics and materials 807)
ISBN: 3-03835-652-2
ISBN: 978-3-03835-652-3 (Print)
ISBN: 978-3-03859-448-2 (CD-ROM)
ISBN: 978-3-0357-0133-3 (eBook)
International Conference on Uncertainty in Mechanical Engineering (ICUME) <2, 2015, Darmstadt>
Fraunhofer LBF ()
additive manufacturing; Ti-6Al-4V; DMLS; DMD; EBM; static properties; Fatigue property; uncertainty

Ti-6Al-4V is the most common used titanium alloy in aerospace. Parts are typically machined from wrought material with often high buy-to-fly ratios. Additive manufacturing, however, allows to build parts rapidly and directly from computer-aided design information, offering better material utilisation and lead time reduction. Despite the high potential for aerospace applications, the reliability of the mechanical properties is still at an early stage. This work gives an overview by determining and comparing the mechanical properties of DMLS, EBM and DMD processed Ti-6Al-4V material. Each process is compared, based on standardised post treatments, specimen geometries and test methods. It can be seen, that the chemical composition, the microstructure, and the defect formation differs between the processes, which leads to a scatter in the experimentally determined static tensile, axial fatigue, and crack growth properties.