Compressive Properties of Ti-6Al-4V Built by Electron Beam Melting

2013 ◽  
Vol 811 ◽  
pp. 108-112 ◽  
Author(s):  
Afshin Mohammadhosseini ◽  
Darren Fraser ◽  
S.H. Masood ◽  
Mahnaz Jahedi
Keyword(s):  
Electron Beam ◽  
Electron Beam Melting ◽  
Weight Ratio ◽  
High Strength ◽  
High Tech ◽  
Layer By Layer ◽  
Micro Hardness ◽  
Compressive Properties ◽  
Before And After ◽  
Metal Additive

Electron beam melting (EBM) is a direct metal additive manufacturing technique in which a 4 kW electron beam is utilized to manufacture the parts in a layer by layer fashion. This paper represents an investigation into the quasi-static compressive deformation behavior of EBM made specimens. The mechanical testing was carried out at strain rate of 10-3 s-1 by a numerically controlled hydraulic MTS machine on both as-built and machined samples manufactured by this high-tech process. The Vickers micro-hardness of the samples has been measured before and after the compression test. The microstructure of the compressed sample was characterized. The particle size distribution, morphology, and chemical composition of the Ti6Al4V, which is one of the most common materials for biomedical implants because of its high strength to weight ratio, corrosion resistance, and its biocompatibility features, have been investigated. The fracture surface has been characterized by scanning electron microscope.

Mechanical Properties Investigation of HIP and As-Built EBM Parts

2012 ◽  
Vol 576 ◽  
pp. 216-219 ◽  
Author(s):  
Afshin Mohammad Hosseini ◽  
S.H. Masood ◽  
Darren Fraser ◽  
Mahnaz Jahedi
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Electron Beam Melting ◽  
Vickers Microhardness ◽  
Hot Isostatic Pressing ◽  
Weight Ratio ◽  
High Strength ◽  
Biomedical Implants ◽  
Titanium Alloy Ti6al4v ◽  
Metal Additive

Electron beam melting (EBM) is a direct metal additive manufacturing technique which has been recently utilized for fabrication of biomedical implants. This paper represents an investigation into the mechanical properties of both as-built and hot isostatic pressing (HIP) processed samples manufactured in EBM process. The titanium alloy, Ti6Al4V was used, which is one of the most common materials for biomedical implants due to its high strength to weight ratio, corrosion resistance, and its biocompatibility features. Tensile properties, surface roughness, and Vickers microhardness have been investigated.

A Study of Morphology of Titanium Powder Used in Electron Beam Melting

2014 ◽  
Vol 541-542 ◽  
pp. 160-163 ◽  
Author(s):  
Afshin Mohammadhosseini ◽  
Darren Fraser ◽  
S.H. Masood ◽  
Mahnaz Jahedi
Keyword(s):  
Electron Beam ◽  
Manufacturing Process ◽  
Electron Beam Melting ◽  
Chemical Properties ◽  
Great Promise ◽  
Layer By Layer ◽  
Recycling Process ◽  
Weight Percentage ◽  
Before And After ◽  
Interstitial Elements

Electron beam melting (EBM) has been recognized as a revolutionary manufacturing process. This layer-by-layer additive manufacturing process has shown great promise for fabrication of biomedical implants and aerospace components. This paper represents an investigation into the particle size distribution, morphology and flow-ability of Ti6Al4V powder used in EBM process. The effect of recycling of the powder on the chemical properties has been investigated. Results show that recycling increases the weight percentage of interstitial elements. The flow-ability and apparent density of the powder were measured before and after recycling process and no change was observed.

scholarly journals Producing Of High-strength Titanium Alloy Vt22 By Method Of Electron Beam Melting

2018 ◽  
Vol 2018 (3) ◽  
pp. 8-15
Author(s):  
S.V. Akhonin ◽  
◽  
V.A. Berezos ◽  
A.N. Pikulin ◽  
A.Yu. Severin ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Electron Beam Melting ◽  
High Strength ◽  
Alloy Vt22 ◽  
Titanium Alloy Vt22

scholarly journals Mechanical Behavior of Differently Oriented Electron Beam Melting Ti–6Al–4V Components Using Digital Image Correlation

2018 ◽  
Vol 141 (1) ◽  
Author(s):  
Edel Arrieta ◽  
Mohammad Haque ◽  
Jorge Mireles ◽  
Calvin Stewart ◽  
Cesar Carrasco ◽  
...  
Keyword(s):  
Electron Beam ◽  
Digital Image Correlation ◽  
Failure Analysis ◽  
Digital Image ◽  
Electron Beam Melting ◽  
Measuring Method ◽  
Image Correlation ◽  
Layer By Layer ◽  
Strain Fields ◽  
Shear Effects

Mechanical properties of additive manufactured metal components can be affected by the orientation of the layer deposition. In this investigation, Ti–6Al–4V cylindrical specimens were fabricated by electron beam melting (EBM) at four different build angles (0 deg, 30 deg, 60 deg, and 90 deg) and tested as per ASTM E8 Standard Test Methods for Tension Testing of Metallic Materials. With the layer-by-layer fabrication suggesting granting anisotropic properties to the builds, strain fields were recorded by digital image correlation (DIC) in the search for shear effects under uniaxial loads. For the validation of this measuring method, axial strains were measured with a clip extensometer and a virtual extensometer, simultaneously. Failure analysis of the specimens at different orientations was conducted to evidence the recording of shear strain fields. The failure analysis included fractography, optical micrographs of the microstructure distribution, and failure profiles displaying different failure features associated with the layering orientation. Additionally, an experimental study case of how the failure mode of components can potentially be designed from the fabrication process is presented. At the end, remarks about the shear effects found, and an insight of the possibility of designing components by failure for safer structures are discussed.

scholarly journals Encapsulation of Electron Beam Melting Produced Alloy 718 to Reduce Surface Connected Defects by Hot Isostatic Pressing

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1226 ◽  
Author(s):  
Yunus Emre Zafer ◽  
Sneha Goel ◽  
Ashish Ganvir ◽  
Anton Jansson ◽  
Shrikant Joshi
Keyword(s):  
Electron Beam ◽  
Electron Beam Melting ◽  
Surface Defects ◽  
High Surface ◽  
Hot Isostatic Pressing ◽  
Coated Sample ◽  
Alloy 718 ◽  
Isostatic Pressing ◽  
Before And After ◽  
X Ray Computed

Defects in electron beam melting (EBM) manufactured Alloy 718 are inevitable to some extent, and are of concern as they can degrade mechanical properties of the material. Therefore, EBM-manufactured Alloy 718 is typically subjected to post-treatment to improve the properties of the as-built material. Although hot isostatic pressing (HIPing) is usually employed to close the defects, it is widely known that HIPing cannot close open-to-surface defects. Therefore, in this work, a hypothesis is formulated that if the surface of the EBM-manufactured specimen is suitably coated to encapsulate the EBM-manufactured specimen, then HIPing can be effective in healing such surface-connected defects. The EBM-manufactured Alloy 718 specimens were coated by high-velocity air fuel (HVAF) spraying using Alloy 718 powder prior to HIPing to evaluate the above approach. X-ray computed tomography (XCT) analysis of the defects in the same coated sample before and after HIPing showed that some of the defects connected to the EBM specimen surface were effectively encapsulated by the coating, as they were closed after HIPing. However, some of these surface-connected defects were retained. The reason for such remnant defects is attributed to the presence of interconnected pathways between the ambient and the original as-built surface of the EBM specimen, as the specimens were not coated on all sides. These pathways were also exaggerated by the high surface roughness of the EBM material and could have provided an additional path for argon infiltration, apart from the uncoated sides, thereby hindering complete densification of the specimen during HIPing.

Heat Transfer and Phase Formation through EBM 3D-Printing of Ti-6Al-4V Cylindrical Parts

2018 ◽  
Vol 383 ◽  
pp. 190-195 ◽  
Author(s):  
Vladimir Popov ◽  
Alexander Katz-Demyanetz ◽  
Menachem Bamberger
Keyword(s):  
Heat Transfer ◽  
Electron Beam ◽  
3D Printing ◽  
Electron Beam Melting ◽  
Geometrical Shape ◽  
Layer By Layer ◽  
Cylindrical Parts ◽  
Transfer Modelling ◽  
Simulation Results ◽  
Abaqus Software

3D-printing or additive manufacturing (AM) is a group of novel intensively developed production processes, through which a "printed" object is fabricated layer-by-layer in a desired intricate geometrical shape with following joining it into a monolithic bulk by means of electron beam (EB) or laser beam (LB) melting. The present study is concentrated on the production of simple-shaped (cylindrical) Ti-6Al-4V alloy samples by Electron Beam Melting (EBM). During the rapid cooling of as-printed material's layer, martensitic structure is formed while suppressing of material's diffusivity. Effect of heat transfer conditions on the microstructure and properties obtained has been investigated. Heat transfer modelling and simulation was done utilizing the ABAQUS software package. The microstructure of the obtained material has been characterized by means of SEM and XRD. Microhardness have been also determined and correlated with the simulation results.

scholarly journals Electron Beam Melting Of New High-strength Titanium Alloy T120

2017 ◽  
Vol 2017 (1) ◽  
pp. 15-21 ◽  
Author(s):  
S.V. Akhonin ◽  
◽  
A.N. Pikulin ◽  
V.A. Berezos ◽  
A.Yu. Severin ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Electron Beam Melting ◽  
High Strength

Creep Properties of Ti-48Al-2Cr-2Nb Produced by Selective Electron Beam Melting

2016 ◽  
Vol 704 ◽  
pp. 190-196 ◽  
Author(s):  
Vera Juechter ◽  
Carolin Körner
Keyword(s):  
Electron Beam ◽  
High Temperature ◽  
Electron Beam Melting ◽  
Titanium Aluminides ◽  
Turbine Blades ◽  
Weight Ratio ◽  
Cast Material ◽  
Creep Properties ◽  
Selective Electron Beam Melting ◽  
Temperature Applications

Titanium aluminides are highly attractive for high temperature applications involving dynamic components, e.g. turbine blades or turbocharger wheels, due to their high strength-to-weight ratio. The drawback is the difficult manufacturing of this material class due to the low toughness and high sensitivity to oxygen. Selective electron beam melting SEBM shows a new approach of producing complex titanium aluminide parts without a major oxygen pick up and avoiding problems with brittleness. The high cooling rates of this process lead to a very fine microstructure, which is not fully understood up to now. The microstructure determines the creep properties and therefore defines the performance of this material in high temperature applications. In this contribution, the creep properties of Ti-48Al-2Cr-2Nb fabricated by SEBM are investigated. The influence of the processing parameters and the building direction on the microstructure and the creep properties are discussed and compared to cast material.

Structure and Properties of a Titanium Film – Aluminum Substrate System Alloyed by an Intense Pulsed Electron Beam

2016 ◽  
Vol 683 ◽  
pp. 9-14
Author(s):  
Olga V. Krysina ◽  
Maria E. Rygina ◽  
Elizaveta A. Petrikova ◽  
Anton D. Teresov ◽  
Yurii F. Ivanov
Keyword(s):  
Surface Layer ◽  
Electron Beam ◽  
Wear Rate ◽  
Tribological Properties ◽  
Electron Beam Melting ◽  
High Strength ◽  
Aluminum Substrate ◽  
Structure And Properties ◽  
Titanium Film ◽  
Pulsed Electron Beam

The structure and properties of a Ti film – Al substrate system alloyed by an intense pulsed electron beam are studied. It is shown that electron beam melting of this system provides the formation of a multiphase submicrocrystalline structure with high strength and tribological properties in the surface layer. Irradiation modes, which allow an increase in the microhardness of the material and a decrease in its wear rate, are defined. Physical substantiation of this phenomenon is given.

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