Journal ArticleDOI
Electron Beam Additive Manufacturing of Titanium Components: Properties and Performance
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
Impact of hot isostatic pressing on microstructures of CMSX-4 Ni-base superalloy fabricated by selective electron beam melting
Benjamin Ruttert,Markus Ramsperger,L. Mujica Roncery,Inmaculada Lopez-Galilea,Carolin Körner,Werner Theisen +5 more
TL;DR: In this article, the influence of different HIPing-heat-treatment-strategies with variation of temperature and time at a constant pressure on the SEBM-microstructure was investigated with emphasis primarily on segregation and porosity.
Journal ArticleDOI
An open-architecture metal powder bed fusion system for in-situ process measurements
TL;DR: In this paper, a metal powder bed fusion system for in-situ monitoring of the build process during additive manufacture is presented. But the system is not suitable for high-density, multiple layer components.
Journal ArticleDOI
Polylactides in additive biomanufacturing
Patrina S. P. Poh,Mohit Prashant Chhaya,Felix M. Wunner,Elena M. De-Juan-Pardo,Arndt F. Schilling,Arndt F. Schilling,Jan-Thorsten Schantz,Martijn van Griensven,Dietmar W. Hutmacher,Dietmar W. Hutmacher +9 more
TL;DR: Considerations of poly(lactides) as a biomaterial in additive biomanufacturing are discussed, and both industry and academia efforts in addressing specific challenges in the AM technologies to drive toward AM-enabled industrial revolution are given.
Journal ArticleDOI
Toward in-situ flaw detection in laser powder bed fusion additive manufacturing through layerwise imagery and machine learning
TL;DR: CNN accuracy was demonstrated to be a function of flaw size, suggesting that smaller flaws may be produced by mechanisms that do not alter the surface morphology of the build plate, and improved generalizability was demonstrated, i.e., the ability to generalize to more diverse data than either the training or validation data sets.
Journal ArticleDOI
Effect of laser power on oxygen and nitrogen concentration of commercially pure titanium manufactured by selective laser melting
Tae-Wook Na,Won Rae Kim,Seung-Min Yang,Ohyung Kwon,Jong Min Park,Gun-Hee Kim,Kyung-Hwan Jung,Chang-Woo Lee,Hyung-Ki Park,Hyung Giun Kim +9 more
TL;DR: In this article, the authors analyzed the variation of mechanical properties and its causes with increasing the laser power in the fabrication of pure titanium by selective laser melting (SLM), which resulted in an increase of hardness and strength.
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.