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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 75 for “"laser melting"”.
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Defect Detection in Selective Laser Melting
… manufactured parts produced using selective laser melting (SLM) are prone to defects created during the build process due to part shrinkage while cooling. Currently defects are found only after the part is removed from the printer. To determine whether cracks can be detected before a print is …
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Selective Laser Melting of Finemet Soft Magnetic Material
… corresponding to magnetic performance. The laser-based powder bed fusion (L-PBF) additive manufacturing technique was implemented to bulk-scale fabricate the Finemet nanocrystalline magnetic alloy. This research study aims to reveal the capability of replacing the traditional melt spinning …
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Laser Melting and Subsequent Solidification of a Surface Layer
Made available in DSpace on 2014-12-13T19:55:31Z (GMT). No. of bitstreams: 1 8004193.pdf: 5313164 bytes, checksum: 77a9d10c82875b45ac575b532a99b80d (MD5) Previous issue date: 1979
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Selective laser melting of Ti-35NB alloy: Processing, microstructure and properties
… shapes and tailored properties. The selective laser melting (SLM) is one of the most popular AM techniques, which has the ability to manufacture a wide range of metallic powders in a layer-wise manner and fabricate complex shapes without compromising dimensional accuracy. The toxicity, …
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Design and fabrication of an open-architecture selective laser melting system
… thesis develops a low-cost and open-architecture laser powder bed fusion metal printer to enable the exploration of new materials and process concepts. Starting with a broad review of additive manufacturing, this thesis then explains the powder bed fusion process and reviews the design …
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A precision blade mechanism for powder recoating in Selective Laser Melting
Selective Laser Melting (SLM) is an industrially viable means of additively manufacturing metal components with complex geometries from a wide variety of alloys. In this process, a metal powder is spread onto a build surface in a thin layer, and then the powder is selectively melted to form a …
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Manufacturing and properties of titanium-based materials produced by selective laser melting
… firstly presents the results of using selective laser melting (SLM) to produce commercially pure titanium (CP-Ti) parts. Accurate manipulation of SLM parameters is applied to produce nearly fully dense (>99.5%) CP-Ti parts without any posttreatments. Compared with output from traditional …
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Process-Structure-Property Relationship Study of Selective Laser Melting using Molecular Dynamics
Selective Laser Melting (SLM), a laser-based Additive Manufacturing technique has appealed to the bio-medical, automotive, and aerospace industries due to its ability to fabricate geometrically complex parts with tailored properties and high-precision end-use products. The SLM processing parameters …
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Performance evaluation of alsi10mg mould insert material fabricated by selective laser melting process
… of AlSi10Mg samples fabricated by selective laser melting (SLM) technique, as well as novel fabrication strategies as an alternative to conventional methods in order to produce of plastic injection mould (PIM) tools was investigated. Response surface method (RSM) and variance analysis (ANOVA) …
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Testbeds for quality and porosity control in metal additive manufacturing by selective laser melting
Selective laser melting (SLM) is a metal additive manufacturing process that can achieve high local density and near-net shape geometric accuracy. The dynamics of the meltpool and stability of the melt track upon cooling are critical to the microstructure, porosity, and final properties of the …
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Surface integrity and energy consumption in machining of inconel 718 produced by selective laser melting
… of parameters such as scan speed and laser power, post heat treatment, or machining, are currently being pursued to mitigate these limitations, and it is likely that the fabrication of a functional part lies within the use of all of these efforts. Little study has been done to …
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Improvement to the surface finish of additive laser manufactured parts made by selective laser melting
The Selective Laser Melting (SLM) process has been used since the end of last decade for different applications in the industrial sector. The priority of the technique is to produce fully dense and functional metallic parts of very complex design, but it is limited by a few issues such as quality …
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Investigation of residual stresses in the laser melting of metal powders in additive layer manufacturing
Laser Melting (LM) is an Additive Layer Manufacturing (ALM) process used to produce three-dimensional parts from metal powders by fusing the material in a layerby- layer manner controlled by a CAD model. During LM, rapid temperature cycles and steep temperature gradients occur in the scanned …
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Characterization and recyclability of 304L stainless steel powder for use in the selective laser melting process
… directly from computer-aided design files. Laser Powder-Bed Fusion (L-PBF) is a process among the powder-bed fusion techniques that utilizes a laser to consolidate particles into a material with little porosity. During the L-PBF process, the large energy input from the laser causes the …
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The adoption of laser melting technology for the manufacture of functionally graded cobalt chrome alloy femoral stems
… stems that can be manufactured using Selective Laser Melting (SLM). Square pore cellular structures with compressive properties that are similar to human bone have been presented and incorporated into femoral stems by utilising fully porous and functionally graded designs. A three dimensional …
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Numerical Analysis of the Melt Pool Kinetics in Selective Laser Melting Based Additive Manufacturing of M g2Si Thermoelectric Powders
… enabling sustainable development. Selective Laser Melting (SLM) based additive manufacturing process is a scalable and flexible method that has shown promising results in manufacturing high ZT Bi2T e3 material and is possible to be extended to other material classes such as M g2Si. The …
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Evaluation on performance of square finned conformal cooling channel (sfccc) fabricated by selective laser melting (slm) on plastic moulded part
… of High Speed Machining and Selective Laser Melting (SLM)), and tested using a front panel housing as the injected part for the case study. Eight types of variate SFCCC design (SFCCC 1 to SFCCC 8) employing finned and sub groove concept were analysed via simulation work to determine the …
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Mechanical property and meso-structure assessment of Ti6Al4V parts as a function of high-speed selective laser melting practice (Additive Manufacturing)
… manufacturing techniques such as the selective laser melting practice are built at conventional laser scan speeds typically between 0.1 m/s and 1 m/s. This project is focused on investigating the influence of high laser scan speeds on the microstructure and mechanical properties of Ti6Al4V …
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