Journal ArticleDOI
Influence of process parameters on surface roughness of aluminum parts produced by DMLS.
TLDR
In this paper, a model based on an L18 orthogonal array of Taguchi design was created to perform experimental planning and the upper surfaces of the samples were analyzed before and after shot peening.Abstract:
Direct metal laser sintering (DMLS) is an additive manufacturing technique for the fabrication of near net-shaped parts directly from computer-aided design data by melting together different layers with the help of a laser source. This paper presents an investigation of the surface roughness of aluminum samples produced by DMLS. A model based on an L18 orthogonal array of Taguchi design was created to perform experimental planning. Some input parameters, namely laser power, scan speed, and hatching distance were selected for the investigation. The upper surfaces of the samples were analyzed before and after shot peening. The morphology was analyzed by means of field emission scanning electron microscope. Scan speed was found to have the greatest influence on the surface roughness. Further, shot peening can effectively reduce the surface roughness.read more
Citations
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Journal ArticleDOI
Corrosion of metallic materials fabricated by selective laser melting
TL;DR: In this paper, a review of the relationship between the unique microstructures and the corresponding corrosion behavior of several metallic alloys fabricated by selective laser melting is presented, including Ti-based, Al-based and Fe-based alloys.
Journal ArticleDOI
A big data-driven framework for sustainable and smart additive manufacturing
Arfan Majeed,Yingfeng Zhang,Yingfeng Zhang,Shan Ren,Jingxiang Lv,Tao Peng,Saad Waqar,Enhuai Yin +7 more
TL;DR: A framework of big data-driven sustainable and smart additive manufacturing (BD-SSAM) is proposed which helped AM industry leaders to make better decisions for the beginning of life (BOL) stage of product life cycle and results indicate that energy consumption and quality of the product are adequately controlled which is helpful for smart sustainable manufacturing, emission reduction, and cleaner production.
Journal ArticleDOI
Roughness Effects on Flow and Heat Transfer for Additively Manufactured Channels
TL;DR: In this article, pressure drop and heat transfer results of flow through small, as produced channels that have been manufactured using DMLS in an effort to better understand roughness were evaluated in 10 different coupons made with DMLs all having multiple rectangular channels.
Journal ArticleDOI
Selective laser melting of aluminium and aluminium metal matrix composites: review
Timothy B. Sercombe,Xiaopeng Li +1 more
TL;DR: In this paper, a review of the use of selective laser melting (SLM) in the manufacturing of aluminium and aluminium matrix composites is presented. And the authors explore some of the inherent difficulties in working with aluminium including the presence of a stable oxide layer, high reflectivity and thermal conductivity and poor flowability of the powder.
Journal ArticleDOI
Laser peening: A tool for additive manufacturing post-processing
TL;DR: In this article, the ability of shot and laser peening to enhance the fatigue lifetime and strength of AM parts is evaluated, including for the case of geometric stress risers as expected for fielded AM components.
References
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Book
Laser Material Processing
TL;DR: In this paper, the effect of reflectivity of the surface, when a pure, monochromatic laser (6) is used, is remedied by the simultaneous application of a relatively shorter wavelength beam (1).
Journal ArticleDOI
Selective laser melting of iron-based powder
Jean-Pierre Kruth,Ludo Froyen,J. Van Vaerenbergh,Peter Mercelis,Marleen Rombouts,Bert Lauwers +5 more
TL;DR: In this paper, a mixture of different types of particles (Fe, Ni, Cu and Fe3P) specially developed for selective laser sintering (SLS) is described.
Journal ArticleDOI
Consolidation phenomena in laser and powder-bed based layered manufacturing
TL;DR: In this article, the authors describe which types of laser-induced consolidation can be applied to what type of material, and demonstrate that although SLS/SLM can process polymers, metals, ceramics and composites, quite some limitations and problems cause the palette of applicable materials still to be limited.
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.