Journal ArticleDOI
Economics of additive manufacturing for end-usable metal parts
Eleonora Atzeni,Alessandro Salmi +1 more
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In this paper, a comparison between two different technologies for metal part fabrication, the traditional high-pressure die-casting and the direct metal laser sintering additive technique, is done with consideration of both the geometric possibilities of AM and the economic point of view.Abstract:
Additive manufacturing (AM) of metal parts combined with part redesign has a positive repercussion on cost saving. In fact, a remarkable cost reduction can be obtained if the component shape is modified to exploit AM potentialities. This paper deals with the evaluation of the production volume for which AM techniques result competitive with respect to conventional processes for the production of end-usable metal parts. For this purpose, a comparison between two different technologies for metal part fabrication, the traditional high-pressure die-casting and the direct metal laser sintering additive technique, is done with consideration of both the geometric possibilities of AM and the economic point of view. A design for additive manufacturing approach is adopted. Costs models of both processes are identified and then applied to an aeronautical component selected as case study. This research evidences that currently additive techniques can be economically convenient and competitive to traditional processes for small to medium batch production of metal parts.read more
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Journal ArticleDOI
A decision-making methodology integrated in product design for additive manufacturing process selection
Wei Liu,Zicheng Zhu,Songhe Ye +2 more
TL;DR: This study addresses the gap between the isolated product design and process selection stages by developing the decision-making methodology that can be integrated in product design stages.
Journal ArticleDOI
Green Principles for Vehicle Lightweighting.
Geoffrey M. Lewis,Cailin A. Buchanan,Krutarth Jhaveri,John L. Sullivan,Jarod C. Kelly,Sujit Das,Alan I. Taub,Gregory A. Keoleian +7 more
TL;DR: A set of 10 principles, based on a life cycle perspective and taken as a set, allow a wide range of stakeholders to evaluate the trade-offs inherent in these complex systems and help avoid shifting of burdens to other life cycle phases in the process of improving use-phase environmental performance.
Journal ArticleDOI
Analysis of mechanical properties of lattice structures with stochastic geometric defects in additive manufacturing
TL;DR: In this paper, X-ray computed tomography (CT) was used to extract the shape and distribution of process-induced defects, and the geometric defects were statistically quantified and considered into the ideal finite element model (FEM) to create the statistical FEM.
Journal ArticleDOI
Bending fatigue behaviour of 17-4 PH gears produced via selective laser melting
TL;DR: In this paper, a research project aimed at investigating the bending fatigue properties of 17-4 PH steel applied to gears produced via selective laser melting was presented, in terms of tooth root stress calculated according to the ISO standard in order to compare them with data of other materials.
Journal ArticleDOI
On the Effect of Part Orientation on Stress Distribution in AlSi10Mg Specimens Fabricated by Laser Powder Bed Fusion (L-PBF)
TL;DR: In this article, the effect of part orientation on stress distribution was evaluated for flat samples of AlSi10Mg alloy built along different orientations by means of laser powder bed fusion (L-PBF) process, also known as selective laser melting (SLM).
References
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Book
Additive Manufacturing Technologies: Rapid Prototyping to Direct Digital Manufacturing
TL;DR: Gibson et al. as discussed by the authors presented a comprehensive overview of additive manufacturing technologies plus descriptions of support technologies like software systems and post-processing approaches, and provided systematic solutions for process selection and design for AM Additive Manufacturing Technologies: Rapid Prototyping to Direct Digital Manufacturing.
BookDOI
Rapid manufacturing : an industrial revolution for the digital age
TL;DR: In this paper, the authors present a discussion of the potential of rapid manufacturing in the automotive industry and present a case study of how to modify a garden fork handle in order to make it more efficient.
Journal ArticleDOI
Rapid Manufacturing of Metal Components by Laser Forming
TL;DR: In this article, the main driving force of rapid prototyping or layer manufacturing techniques changed from fabrication of prototypes to rapid tooling (RT) and rapid manufacturing (RM), and nowadays, the direct fabrication of functional or structural end-use products made by layer manufacturing methods, i.e. RM, is the main trend.
Book ChapterDOI
Design for Additive Manufacturing
TL;DR: In this article, the capabilities of additive manufacturing technologies provide an opportunity to rethink DFM to take advantage of the unique capabilities of these technologies, and several companies are now using AM technologies for production manufacturing.
Journal ArticleDOI
Cost estimation for rapid manufacturing - laser sintering production for low to medium volumes:
TL;DR: In this article, a cost model for laser sintering is proposed, which leads to graph profiles that are typical for layer-by-layer manufacturing processes, and the evolution of cost models and the indirect cost significance in modern costing representation is shown.