Journal ArticleDOI
Electron Beam Additive Manufacturing of Titanium Components: Properties and Performance
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TLDR
In this paper, the fatigue properties of Ti-6Al-4V specimens and components produced by Electron Beam additive manufacturing were evaluated and it was found that the fatigue performance of specimens produced by additive manufacturing is significantly lower than that of wrought material due to defects such as porosity and surface roughness.Abstract:
This research evaluates the fatigue properties of Ti-6Al-4V specimens and componentsproduced by Electron Beam additive manufacturing. It was found that the fatigue per-formance of specimens produced by additive manufacturing is significantly lower thanthat of wrought material due to defects such as porosity and surface roughness. However,evaluation of an actual component subjected to design fatigue loads did not result in pre-mature failure as anticipated by specimen testing. Metallography, residual stress, staticstrength and elongation, fracture toughness, crack growth, and the effect of post process-ing operations such as machining and peening on fatigue performance were alsoevaluated. [DOI: 10.1115/1.4025773]Keywords: additive manufacturing, electron beam, titanium, fatigue, fractureread more
Citations
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Journal ArticleDOI
Numerical modeling and testing of mechanical behavior of AM Titanium alloy bracket for aerospace applications
TL;DR: In this article, a geometrically complex structural bracket for aerospace application was designed through a topological optimization and produced in Ti-6Al-4V by means of additive manufacturing.
Journal ArticleDOI
Qualification of additively manufactured aerospace brackets: A comparison between thermoelastic stress analysis and theoretical results
Gloria Allevi,Marco Cibeca,Roberta Fioretti,Roberto Marsili,Roberto Montanini,Gianluca Rossi +5 more
TL;DR: A feasibility study of the Thermoelastic Stress Analysis on a titanium based-alloy space bracket, made by Electron Beam Melting, plus a Non-Destructive Dimensional Measurement (triangulation system for reverse engineering) could enable the classical topology optimization processes to be implemented a posteriori, thus providing an additional time and cost saving.
Journal ArticleDOI
Microstructure anisotropy and its implication in mechanical properties of biomedical titanium alloy processed by electron beam melting
TL;DR: In this paper, the porosity and microstructure of Ti-6Al-4V was studied for electron beam melting (EBM) applications. And the authors found that spherical and elongated pores with strong size effect are common characteristics for the as-EBM samples made with horizontal, diagonal, and vertical orientations w.r.t. the substrate.
Journal ArticleDOI
Fatigue behaviour of additively-manufactured metallic parts
Nima Shamsaei,Jutima Simsiriwong +1 more
TL;DR: In this article, an overview on recent research efforts to obtain an understanding on the fatigue behavior and failure mechanisms of metallic parts fabricated via powder-based additive manufacturing (AM) processes, including direct energy deposition (DED) and powder bed fusion (PBF) methods, utilizing either laser or electron beam as an energy source.
Journal ArticleDOI
Comparison of residual stresses obtained by the crack compliance method for parts produced by different metal additive manufacturing techniques and after friction stir processing
Lv Zhao,Lv Zhao,Juan Guillermo Santos Macias,Adrien Dolimont,Aude Simar,Edouard Rivière-Lorphèvre +5 more
TL;DR: In this paper, the residual stress measurements and analysis on the metal powder bed AM parts using the crack compliance method are investigated for two manufactured alloys, i.e., Ti6Al4V and AlSi10Mg.
References
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Journal ArticleDOI
A study of the microstructural evolution during selective laser melting of Ti–6Al–4V
TL;DR: In this article, the development of the microstructure of the Ti-6Al-4V alloy processed by selective laser melting (SLM) was studied by light optical microscopy.
Journal ArticleDOI
Residual stresses in selective laser sintering and selective laser melting
Peter Mercelis,Jean-Pierre Kruth +1 more
TL;DR: In this paper, a simple theoretical model is developed to predict residual stress distributions in selective laser sintering (SLS) and selective laser melting (SLM), aiming at a better understanding of this phenomenon.
Journal ArticleDOI
Progress in Additive Manufacturing and Rapid Prototyping
TL;DR: Rapid prototyping generally refers to techniques that produce shaped parts by gradual creation or addition of solid material, therein differing fundamentally from forming and material removal manufacturing techniques as mentioned in this paper. But it is not suitable for all applications.
Journal ArticleDOI
Rapid manufacturing and rapid tooling with layer manufacturing (lm) technologies, state of the art and future perspectives
TL;DR: In this article, a systematic material dependent classification of layer manufacturing and process oriented metal part manufacturing techniques are proposed, mainly for metallic parts, polymer parts and tooling, and the generic and the major specific process characteristics and materials are described.
Journal ArticleDOI
On the mechanical behaviour of titanium alloy TiAl6V4 manufactured by selective laser melting: Fatigue resistance and crack growth performance
Stefan Leuders,M. Thöne,Andre Riemer,Thomas Niendorf,Thomas Tröster,Hans Albert Richard,Hans Jürgen Maier +6 more
TL;DR: In this article, the microstructure-defect-property relationship under cyclic loading for a TiAl6V4 alloy processed by selective laser melting is investigated. And the results show that the micron sized pores mainly affect fatigue strength, while residual stresses have a strong impact on fatigue crack growth.