On the build orientation effect in as-printed and as-sintered bending properties of 17-4PH alloy fabricated by metal fused filament fabrication
ISSN: 1355-2546
Article publication date: 12 January 2022
Issue publication date: 23 May 2022
Abstract
Purpose
The purpose of this paper is to systematically investigate the influence of build orientation on the anisotropic as-printed and as-sintered bending properties of 17-4PH stainless steel fabricated by metal fused filament fabrication (MFFF).
Design/methodology/approach
The bending properties of 17-4PH alloy fabricated by low-cost additive manufacturing (MFFF) using three build orientations (the Flat, On-edge and Upright orientations) are examined at both as-printed and as-sintered states.
Findings
Unlike tensile testing where the Flat and On-edge orientations provide similar as-sintered tensile properties, the On-edge orientation produces a significantly higher bending strain with a lower bending strength than the Flat orientation. This arises from the printed layer sliding due to the Poisson's effect, which is only observed in the On-edge orientation together with the alternated layers of highly deformed and shifted voids. The bending properties show that the Upright orientation exhibits the lowest bending properties and limited plasticity due to the layer delamination.
Originality/value
This study is the first work to study the effect of build orientation on the flexural properties for MFFF. This work gives insight information into anisotropy in flexural mode for MFFF part design.
Keywords
Acknowledgements
The authors sincerely thank Vorawat Vadhanakovint (Septillion Co., Ltd., Thailand), Sukrit Songkuea and Phanuphak Seensattayawong (MTEC, Thailand) for their helpful skills.
Funding: This work conducted under Newton Fund was supported by the Royal Academy of Engineering through the Engineering X Transforming Systems through Partnership programme, UK and the Office of National Higher Education Science Research and Innovation Policy Council (NXPO), Thailand, through Program Management Unit for Competitiveness (PMU C), Grant No. TSP2021_100052.
Citation
Suwanpreecha, C. and Manonukul, A. (2022), "On the build orientation effect in as-printed and as-sintered bending properties of 17-4PH alloy fabricated by metal fused filament fabrication", Rapid Prototyping Journal, Vol. 28 No. 6, pp. 1076-1085. https://doi.org/10.1108/RPJ-07-2021-0174
Publisher
:Emerald Publishing Limited
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