Abstract
A statistical approach for the characterization of Additive Manufacturing (AM) processes is presented in this paper. Design of Experiments (DOE) and ANalysis of VAriance (ANOVA), both based on Nested Effects Modeling (NEM) technique, are adopted to assess the effect of different laser exposure strategies on physical and mechanical properties of AlSi10Mg parts produced by Direct Metal Laser Sintering (DMLS). Due to the wide industrial interest in AM technologies in many different fields, it is extremely important to ensure high parts performances and productivity. For this aim, the present paper focuses on the evaluation of tensile properties of specimens built with different laser exposure strategies. Two optimal laser parameters settings, in terms of both process quality (part performances) and productivity (part build rate), are identified.
Highlights
Additive Manufacturing (AM) is considered as the opposite of subtractive manufacturing: the final functional part is gradually built by adding material layer upon layer, instead of removing it.AM processes offer several technical and economic benefits compared to traditional subtractive manufacturing processes
The present paper focuses on the evaluation of tensile properties of specimens built with different laser exposure strategies
This paper focuses on the definition and implementation of statistical methods to study the effects of different laser exposure strategies on the achievable tensile properties of AlSi10Mg parts produced by the Direct Metal Laser Sintering (DMLS) technology, as well as on the process productivity itself, since the research activity was developed within a corporate context
Summary
Additive Manufacturing (AM) is considered as the opposite of subtractive manufacturing: the final functional part is gradually built by adding material layer upon layer, instead of removing it. AM processes offer several technical and economic benefits compared to traditional subtractive manufacturing processes. They have the capability to produce complex shapes which are not feasible with traditional manufacturing processes. AM processes, integrated with techniques for topology optimization and other design methods can generate complex shapes, and potentially allow saving time, material and costs. Direct Metal Laser Sintering (DMLS), a typical Powder Bed Fusion (PBF) process based on the layer-by-layer spreading and subsequent laser sintering of metal powders [1], was considered in this paper
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