Title: Fatigue behaviour of direct metal laser sintered Inconel 718

Authors: P.F. Kelley; A. Saigal; A. Carter

Addresses: Department of Mechanical Engineering, Tufts University, Medford, MA 02155, USA ' Department of Mechanical Engineering, Tufts University, Medford, MA 02155, USA ' Department of Mechanical Engineering, Tufts University, Medford, MA 02155, USA

Abstract: This research focuses on characterising the high cycle fatigue (HCF) behaviour of Inconel 718 produced via the direct metal laser sintering (DMLS) process. Material anisotropy in three orthogonal build orientations was evaluated along with the influence of the as-fabricated surface quality on fatigue performance. Results showed that specimens produced in an optimal build orientation with machined surfaces correlated well with published data for traditionally processed Inconel 718.

Keywords: additive manufacturing; DMLS; direct metal laser sintering; Inconel 718; HCF; high cycle fatigue; R.R. Moore; fatigue behaviour; material anisotropy; surface quality.

DOI: 10.1504/IJPTECH.2016.080001

International Journal of Precision Technology, 2016 Vol.6 No.3/4, pp.277 - 288

Received: 04 Mar 2016
Accepted: 07 Sep 2016
Published online: 26 Oct 2016 *

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