Effect of process conditions on mechanical behavior of aluminium wrought alloy EN AW-2618 additively manufactured by Laser Beam Melting in powder bed

Karg M, Ahuja B, Schaub A, Schmidt J, Sachs M, Mahr A, Wiesenmayer S, Wigner L, Wirth KE, Peukert W, Merklein M, Schmidt M (2015)

Publication Language: English

Publication Type: Conference contribution

Publication year: 2015

Pages Range: 1-9

Conference Proceedings Title: Proceedings of Laser in Manfacturing Conference 2015

Event location: Messe München DE

URI: http://www.wlt.de/lim/Proceedings/Stick/4.html

Open Access Link: http://www.wlt.de/lim/Proceedings/Stick/PDF/Contribution146_final.pdf

Abstract

Additive Manufacturing offers geometric freedom excellently suited for topology optimized light weight designs. Ideally these should be built from materials of high strength to weight ratio and high plastic formability- such as aluminium-copper wrought alloys. Al-Cu wrought alloys are considered much less suitable for welding without cracks, so processing them in Laser Beam Melting of Metals in powder bed (LBM) can be considered challenging. Today, the only class of aluminium alloys widely processed by LBM is that of aluminium-silicon cast alloys which are easily weldable. In this contribution, mechanical characteristics of LBM samples are presented and discussed. Tensile tests were conducted under variation of load direction relative to build-up direction and heat treatment. Pronounced anisotropy was observed. Remarkably, elongation at break of T6 heat treated samples pulled in build-up direction exceeds values from literature for conventionally manufactured EN AW-2618A. The chemical constitutions of both the powder and the LBM samples were analyzed and shown to be similar to the expected EN AW-2618A. For further interpretation, boundary conditions of sample production, metallographic microsections and fracture surfaces were considered.

Authors with CRIS profile

Michael Karg Lehrstuhl für Photonische Technologien (LPT) Bhrigu Ahuja Lehrstuhl für Photonische Technologien (LPT) Adam Schaub Institute of Manufacturing Technology (LFT) Jochen Schmidt Lehrstuhl für Partikelsynthese (LFG) Marius Christ Professur für Partikeltechnik Karl-Ernst Wirth Professur für Partikeltechnik Wolfgang Peukert Lehrstuhl für Partikelsynthese (LFG) Marion Merklein Institute of Manufacturing Technology (LFT) Michael Schmidt Lehrstuhl für Photonische Technologien (LPT)

Additional Organisation(s)

Sonderforschungsbereich 814/3 Additive Fertigung Erlangen Graduate School in Advanced Optical Technologies (SAOT) Zentralinstitut für Neue Materialien und Prozesstechnik

How to cite

APA:

Karg, M., Ahuja, B., Schaub, A., Schmidt, J., Sachs, M., Mahr, A.,... Schmidt, M. (2015). Effect of process conditions on mechanical behavior of aluminium wrought alloy EN AW-2618 additively manufactured by Laser Beam Melting in powder bed. In Proceedings of Laser in Manfacturing Conference 2015 (pp. 1-9). Messe München, DE.

MLA:

Karg, Michael, et al. "Effect of process conditions on mechanical behavior of aluminium wrought alloy EN AW-2618 additively manufactured by Laser Beam Melting in powder bed." Proceedings of the Lasers in Manufacturing Conference 2015, Messe München 2015. 1-9.

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