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Materials (Basel). 2014 Jun 23;7(6):4803-4822. doi: 10.3390/ma7064803.

Manufacturing and Characterization of Ti6Al4V Lattice Components Manufactured by Selective Laser Melting.

Author information

1
Dip. di Meccanica, Matematica e Management-Politecnico di Bari, Viale Japigia 182, 70126 Bari, Italy. sabinaluisa.campanelli@poliba.it.
2
Dip. di Meccanica, Matematica e Management-Politecnico di Bari, Viale Japigia 182, 70126 Bari, Italy. nicola.contuzzi@poliba.it.
3
Dip. di Meccanica, Matematica e Management-Politecnico di Bari, Viale Japigia 182, 70126 Bari, Italy. antoniodomenico.ludovico@poliba.it.
4
Dip. di Ingegneria Industriale-Università degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano (SA), Italy. fcardaro@unisa.it.
5
Dip. di Ingegneria Industriale-Università degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano (SA), Italy. sergi@unisa.it.

Abstract

The paper investigates the fabrication of Selective Laser Melting (SLM) titanium alloy Ti6Al4V micro-lattice structures for the production of lightweight components. Specifically, the pillar textile unit cell is used as base lattice structure and alternative lattice topologies including reinforcing vertical bars are also considered. Detailed characterizations of dimensional accuracy, surface roughness, and micro-hardness are performed. In addition, compression tests are carried out in order to evaluate the mechanical strength and the energy absorbed per unit mass of the lattice truss specimens made by SLM. The built structures have a relative density ranging between 0.2234 and 0.5822. An optimization procedure is implemented via the method of Taguchi to identify the optimal geometric configuration which maximizes peak strength and energy absorbed per unit mass.

KEYWORDS:

Ti6Al4V titanium alloy; characterization; micro-lattice structures; selective laser melting; tailored porosity

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