Direct metal laser sintering
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Mechanical behavior of additive manufactured, powder-bed laser-fused materials Open
Mechanical behavior of four metallic alloys fabricated with layered, laser-heated methods of additive manufacturing (AM) was compared to that of similar alloys produced with conventional methods (wrought and machined). AM materials were pr…
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Laser and electron‐beam powder‐bed additive manufacturing of metallic implants: A review on processes, materials and designs Open
Additive manufacturing (AM), also commonly known as 3D printing, allows the direct fabrication of functional parts with complex shapes from digital models. In this review, the current progress of two AM processes suitable for metallic orth…
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Selective laser manufacturing of Ti-based alloys and composites: impact of process parameters, application trends, and future prospects Open
Aviation and automobile industries demand high strength, fatigue resistant, and wear-resistant materials in combination with lightweight, especially for structural applications. On the other hand, biomedical applications demand materials w…
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Overhanging Features and the SLM/DMLS Residual Stresses Problem: Review and Future Research Need Open
A useful and increasingly common additive manufacturing (AM) process is the selective laser melting (SLM) or direct metal laser sintering (DMLS) process. SLM/DMLS can produce full-density metal parts from difficult materials, but it tends …
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Mechanical Properties and Microstructure of DMLS Ti6Al4V Alloy Dedicated to Biomedical Applications Open
The aim of this work was to investigate the microstructure and mechanical properties of samples produced by direct metal laser sintering (DMLS) with varied laser beam speed before and after heat treatment. Optical analysis of as-built samp…
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Effect of Surface Roughness on Fatigue Strength of Ti-6Al-4V Alloy Manufactured by Additive Manufacturing Open
This study focuses on the effects of surface roughness on the fatigue strength of Ti-6Al-4V alloy manufactured by additive manufacturing (AM); electron beam melting (EBM) and direct metal laser sintering (DMLS) methods. The hot isostatic p…
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Informing additive manufacturing technology adoption: total cost and the impact of capacity utilisation Open
Informing Additive Manufacturing (AM) technology adoption decisions, this paper investigates the relationship between build volume capacity utilisation and efficient technology operation in an inter-process comparison of the costs of manuf…
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Direct Metal Laser Sintering Open
A few years ago, 3D printing and additive manufacturing (AM) were next generation technologies and well known as methods for rapid prototyping. Less rapid manufacturing applications were on the market (e. g. manufacturing of dental crowns …
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Evaluation of Dislocation Densities in Various Microstructures of Additively Manufactured Ti6Al4V (Eli) by the Method of X-ray Diffraction Open
Dislocations play a central role in determining strength and flow properties of metals and alloys. Diffusionless phase transformation of β→α in Ti6Al4V during the Direct Metal Laser Sintering (DMLS) process produces martensitic microstruct…
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Effect of shot peening on the surface properties, corrosion and wear performance of 17-4PH steel produced by DMLS additive manufacturing Open
Components produced by additive manufacturing (AM) via direct metal laser sintering (DMLS) have typical as-fabricated surface defects. As a result, surface properties of AM products should be modified to increase their strength, anti-wear …
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Recent Advances in Manufacturing and Surface Modification of Titanium Orthopaedic Applications Open
Implant failure is a common problem in orthopedic applications, which causes pain and stress for patients, prolonged antibiotic therapy, increased time and cost of hospitalization, and revision surgery. Selecting the optimum porous structu…
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MICROSTRUCTURE AND MECHANICAL PROPERTIES OF DIRECT METAL LASER SINTERED TI-6AL-4V Open
CITATION: Becker, T. H., Beck, M. & Scheffer, C. 2015. Microstructure and mechanical properties of direct metal laser sintered TI-6AL-4V. South African Journal of Industrial Engineering, 26(1):1-10, doi:10.7166/26-1-1022.
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Influence of build orientation on static and axial fatigue properties of maraging steel specimens produced by additive manufacturing Open
Additive manufacturing involves a layer-by-layer build-up of mechanical parts and it is a manufacturing technology that can be adopted with different engineering metal materials like steels, aluminium and titanium alloys. Aim of the presen…
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Fatigue limit of Ti6Al4V alloy produced by Selective Laser Sintering Open
3D printing is an advanced manufacturing technology for producing metal components, and titanium is a typical alloy that is used in this technique. Some limitations and peculiarity should be considered during the design of components by ad…
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Effect of Various Peening Methods on the Fatigue Properties of Titanium Alloy Ti6Al4V Manufactured by Direct Metal Laser Sintering and Electron Beam Melting Open
Titanium alloy Ti6Al4V manufactured by additive manufacturing (AM) is an attractive material, but the fatigue strength of AM Ti6Al4V is remarkably weak. Thus, post-processing is very important. Shot peening can improve the fatigue strength…
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Surface Finishes for Ti-6Al-4V Alloy Produced by Direct Metal Laser Sintering Open
The implant’s surface is responsible for direct interaction with the human body. For cases where osseointegration must be favored and the risk of bacteria proliferation is lower, rough surfaces are more suitable, while for implants where t…
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A Study on the Stair Stepping Effect in Direct Metal Laser Sintering of a Nickel-based Superalloy Open
Like other additive manufacturing processes, the stair stepping effect is the main reason of a low surface quality in direct metal laser sintering (DMLS) due to the layered nature of the process. Furthermore, the processing variables such …
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Metal Additive Manufacturing of Plastic Injection Molds with Conformal Cooling Channels Open
Conformal cooling channels (CCCs) are widely used in the plastic injection molding process to improve the product quality and operational performance. Tooling that incorporates CCCs can be fabricated through metal additive manufacturing (M…
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A Review of Different Manufacturing Methods of Metallic Foams Open
Metallic foam is a popular topic due to its diverse industrial applications and unique combination of properties. Metallic foam is significantly lighter than nonfoam metal materials due to its porous structure, which incorporates a substan…
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A Review of Conventional versus Additive Manufacturing for Metals: Life-Cycle Environmental and Economic Analysis Open
Additive manufacturing (AM) is a recent emerging technology that is being adopted in various industry sectors and supply chains. Life cycle assessment (LCA) and life cycle costing (LCC) are powerful methods that can be used for assessing t…
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Review of materials used in laser-aided additive manufacturing processes to produce metallic products Open
Rapid prototyping (RP) or layered manufacturing (LM) technologies have been extensively used to manufacture prototypes composed mainly of plastics, polymers, paper, and wax due to the short product development time and low costs of these t…
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Influence of Build Orientation, Heat Treatment, and Laser Power on the Hardness of Ti6Al4V Manufactured Using the DMLS Process Open
This contribution is focused on the influence of build orientation on hardness of materials sintered using direct metal laser sintering (DMLS) technology. It builds on the current research works that has monitored the influence of build or…
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Examination of material manufactured by direct metal laser sintering (DMLS) Open
This article is concerned with assessing microstructural properties of metal component manufactured by additive DMLS technology. Two series of samples were assessed. The first one was manufactured without heat treatment. Samples in the sec…
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Improving Surface Finish of 3D-printed Metals by Ultrasonic Nanocrystal Surface Modification Open
Poor surface finish of 3D-printed metals significantly deteriorates their corrosion, wear and fatigue resistance. Ultrasonic nano-crystal surface modification (UNSM) is an innovative surface processing technique that utilizes low amplitude…
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Study of Materials Produced by Powder Metallurgy Using Classical and Modern Additive Laser Technology Open
The paper focuses on an analysis of materials produced by modern classic additive method direct metal laser sintering (i.e. powder metallurgy). Direct metal laser sintering belongs to file of additive technologies of rapid prototyping. Rap…
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Effect of Laser Energy Density, Internal Porosity and Heat Treatment on Mechanical Behavior of Biomedical Ti6Al4V Alloy Obtained with DMLS Technology Open
The purpose of this paper was to determine the influence of selected parameters of Direct Metal Laser Sintering and various heat treatment temperatures on the mechanical properties of Ti6Al4V samples oriented vertically (V, ZX) and horizon…
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Effect of Shot Peening on the Mechanical Properties and Cytotoxicity Behaviour of Titanium Implants Produced by 3D Printing Technology Open
Structural discontinuities characterize the implants produced directly from metal powders in 3D printing technology. Mainly, the surface defects should be subjected to procedures associated with surface layer modification (likewise shot pe…
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TENSILE PROPERTIES AND MICROSTRUCTURE OF DIRECT METAL LASER-SINTERED TI6AL4V (ELI) ALLOY Open
CITATION: Moletsane, M. G., et al. 2016. Tensile properties and microstructure of direct metal laser-sintered TI6AL4V (ElI) alloy. South African Journal of Industrial Engineering, 27(3):110-121, doi:10.7166/27-3-1667.
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Biomedical Co-Cr-Mo Components Produced by Direct Metal Laser Sintering1 Open
Direct Metal Laser Sintering (DMLS) is an additive manufacturing technique based on a laser power source that sinters powdered materials using a 3D CAD model. The mechanical components produced by this procedure typically show higher resid…
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Mechanical performance of additively manufactured austenitic 316L stainless steel Open
For tensile tests, Vickers hardness tests and microstructure tests, plate-type and box-type specimens of austenitic 316L stainless steels were produced by a conventional machining (CM) process as well as two additive manufacturing processe…