slm process
On the Modeling and Simulation of SLM and SLS for Metal and …
Nevertheless, SLM as a newly developed process is facing challenges that have to be overcome in order for SLM to become a competitive manufacturing alternative process. SLM suffers from melt pool instabilities, leading to parts'' defects and imperfections, like low quality down-facing surfaces, increased upper-surface roughness …
Selective Laser Melting of Stainless-Steel: A Review of Process, Microstructure, Mechanical Properties and Post-Processing …
SLM process is one of main technology of AM used to produce metal component from a powder bed. It is resulting from the process of selective laser sintering (SLS) developed and patented by Deckard at the University of Texas in the 1980 [ 1 ].
Defect Formation Mechanisms in Selective Laser Melting: A …
Defect formation is a common problem in selective laser melting (SLM). This paper provides a review of defect formation mechanisms in SLM. It summarizes the recent research outcomes on defect findings and classification, analyzes formation mechanisms of the common defects, such as porosities, incomplete fusion holes, and …
A comprehensive study on thermal modeling of SLM process …
Selective laser melting (SLM) has emerged as one of the leading additive manufacturing (AM) processes for the fabrication of complex metallic components, due to its capability to achieve high quality at acceptable times. However, due to the complexity of physical phenomena occurring during SLM, such as heat transfer and phase …
Selective laser melting: principles and surface quality
Selective laser melting (SLM) is one of the most widely used additive manufacturing (AM) processes for metallic materials, based on powder-bed fusion. It can be defined as a process whereby 3D functional parts can be produced by selectively scanning and consolidating a powder bed in a layer-wise manner.
State-of-the-art of selective laser melting process: A …
SLM process can alleviate for smart materials with poor machinability characteristics such as Nickel-Titanium or Nitinol (NiTi) shape memory alloy within a …
Selective laser melting processing of 316L stainless steel: effect of …
Selective laser melting (SLM) is one key method of the powder bed AM technologies, possessing relatively high forming precision and good surface quality, and …
Selective laser melting of Ti6Al4V alloy: Process parameters, …
The existence of these features is contributed by the cooling rate during SLM process, which can be further controlled by the different in-process SLM parameters [104]. With an increase in energy density, the width of individual α 0 and the spacing between them will decrease; however, the width of the columnar grain will increase [ 105 ].
Selective laser melting: principles and surface quality
Selective laser melting (SLM) is one of the most widely used additive manufacturing (AM) processes for metallic materials, based on powder-bed fusion. It …
Selective Laser Melting
Selective Laser Melting Selective laser melting (SLM) is one of the most widely used additive manufacturing (AM) processes for metallic materials, based on powder-bed fusion. Selective laser melting (SLM) is a powder-bed-fusion AM process whereby a high-density-focused laser beam selectively scans a powder bed and those scanned and solidified …
Materials | Free Full-Text | Selective Laser Melting …
The equiatomic CoCrFeNiMn high-entropy alloy (HEA) possesses excellent properties including exceptional strength–ductility synergy, high corrosion resistance, and good thermal stability. Selective …
What is SLM 3D Printing: A Comprehensive Guide
Conversely, post-processing for SLM-printed parts typically involves the removal of support structures, with potential additional steps like heat treatment. Furthermore, SLS 3D printing equipment typically employs CO2 lasers, while SLM devices commonly use fiber lasers, adapting to their distinct working principles and material requirements.
Selective Laser Melting of Stainless Steels: A review of Process, …
The article also compares SLM and conventionally produced material properties and presents the effects of post-process treatments on SLM-processed stainless steels. The aim of this paper is to fill the gap by providing a complete insight into the microstructural evolution and its impact on the mechanical, fatigue, and corrosion …
SLM process parameters effects on the fatigue strength of AMed …
Conclusions On the basis of an analytical model of the feasible region for the process parameters adopted for the SLM of the alloy Inconel 718, two sets of process parameters aimed to increase the productivity rate were selected, A1 and A2, featuring a different combination of laser power, scan velocity and hatch distance.
In-process sensing in selective laser melting (SLM) …
Additive manufacturing and specifically metal selective laser melting (SLM) processes are rapidly being industrialized. In order for this technology to see more widespread use as a production modality, …
Numerical Modeling of Selective Laser Melting: Influence of Process …
An efficient approach for virtual prediction of melt pool geometry and temperature distribution in selective laser melting (SLM) is required to optimize the process parameters for eventually printing high-fidelity parts. In this study, the melt pool geometry in the SLM process was simulated by employing Ansys Additive, the commercial finite …
Materials | Free Full-Text | A Multi-Objectives Genetic Algorithm Based Predictive Model and Strategy Optimization during SLM Process
Selective laser melting (SLM) process was optimized in this work using multi-objectives genetic algorithm. Process parameters involved in the printing process have an obvious impact on the quality of the printed parts. As the relationship between process parameters and the quality of different parts are complex, it is quite essential to …
Micromachines | Free Full-Text | A Review of Research …
SLM technology can process dense parts with complex shapes, good surface roughness, and high dimensional accuracy; thus, SLM can be used to process high-temperature alloys, and other factors. The …
What is SLM Additive Manufacturing? | Additive Manufacturing …
Table of Contents. Selective laser melting (SLM), also known as direct metal laser sintering (DMLS) or laser powder bed fusion (LPBF), is a powder bed fusion technology used in additive manufacturing. SLM uses a high-powered laser to fuse and melt metallic powders together to produce fully dense 3D objects layer by layer.
Study on the numerical simulation of laying powder for the selective laser melting process …
Because the selective laser melting (SLM) formation process involves rapid melting and solidification of slices, the SLM process places high demands on the tightness, uniformity, and flatness of the powder layer. Based on the discrete element method (particle contact force model, particle collision judgment algorithm, and particle …
Influence of selective laser melting process parameters on the …
Considering the SLM process, various factors like the type of the finishing machining process and parameters, used determine and are responsible for the formation of textures on the finished part. Dursun et al. [ 116 ] studied the surface properties of SS316L fabricated using SLM, focusing on the influence of laser input factors on the …
(PDF) Review of selective laser melting: Materials and …
Selective Laser Melting (SLM) is a particular rapid prototyping, 3D printing, or Additive Manufacturing (AM) technique designed to use high power-density laser to...
Materials Used in Selective Laser Melting (SLM)
Selective Laser Melting (SLM) refers to the additive manufacturing (AM) process that builds up a complex three-dimensional (3D) object by using a laser beam to melt powder materials [1]. SLM has been considered one of the most versatile technologies as it can process a wide variety of materials, particularly metals and alloys [2].
SLM®280 PS: Highly Productive 3D Printer | SLM Solutions
SLM®280 Production Series With a build plate 25% larger than standard mid-sized machines to fit more parts per build, the SLM ® 280 Production Series is a high-power, multi-laser machine designed for production oriented additive manufacturing. The SLM ® 280 Production Series utilizes our patented multi-laser scan strategy to minimize soot …
Effect of selective laser melting (SLM) process parameters on microstructure and mechanical properties of …
Representative optical images of 316L-SLM components, processed with building orientations of 45 and 90, respectively and the same process parameters (150 W power, 700 mm/s scan speed, 0.07 mm hatch space) are reported in Fig. 3 a and b.
What is Additive Manufacturing? | SLM Solutions
Additive Manufacturing and Selective Laser Melting. Additive manufacturing encompases a variety of processes to build, however, they are all based on the same principle of adding material to create opposed to traditional methods that subtract material. Specifically in selective laser melting: Data taken directly from digital CAD files is ...
Productivity-oriented SLM process parameters effect on the …
The low productivity of the SLM process is known to be a limiting factor, but speeding up the process can lead to material defects. Two sets of SLM process parameters enhancing its productivity by 50 % were devised and tested in comparison with baseline sets, in terms of material microstructure, porosity, surface roughness, static …
Selective Laser Melting
Selective laser melting (SLM) is a powder bed fusion process that uses a laser beam to fuse metallic powders selectively, layer by layer, and based on a CAD file. The …
A Review on Energy Consumption and Efficiency of Selective Laser …
Selective laser melting (SLM) exhibits excellent manufacturing accuracy and forming ability. However, the laser beam layering process is characterized by high specific energy consumption, long manufacturing cycle, and low energy efficiency. The use of supports increases the SLM building quality and eliminates defects caused by thermal …
Review on residual stress in selective laser melting additive manufacturing …
The unsteady thermodynamic state of the solidified phase in SLM process is very similar to that of the material during laser welding (multi-pass welding) [40], [41]. Based on the analogous thermal-mechanical conditions, the knowledge on the arising of the residual stress in laser welding could provide much useful reference for the SLM.
Investigation into the effect of the SLM processing parameters on …
Metal additive manufacturing (AM) has become a widely adopted technique in various industries, owing to its flexible free-form manufacturing capabilities. M300 steel is widely applicable in industrial applications due to its exceptional mechanical properties, including superior strength and toughness. This study explores the effects of …
State-of-the-art of selective laser melting process: A …
PBF processes are categorized into beam-based PBF, which requires a high energy beam, and non-beam (heater/lamp)-based PBF, which does not require a high energy beam. Selective Laser Sintering (SLS), Selective Laser Melting (SLM), and Electron Beam Melting (EBM) are examples of beam-based PBF processes. The beam-based …
Establishment of a three-dimensional mathematical model of SLM process …
The present work constructed a three-dimensional mathematical model of the selective laser melting (SLM) process based on the smoothed particle hydrodynamics (SPH) method. The Navier–Stokes equation was used to control the continuous molten metal flow; the model of continuous surface tension, the wetting effect, and Marangoni …
Selective Laser Melting
The most common additive manufacturing method is called Selective Laser Melting (SLM), developed at the Fraunhofer Institute for Laser Technol-ogy ILT [2]. Selective Laser …
Modeling and simulation of metal selective laser melting process: …
As a technology of additive manufacturing (AM), selective laser melting (SLM) is widely used in metal printing, such as super-alloys, stainless steel. Also, the SLM is considered the most potential metal additive manufacturing technology. It is difficult to build a process-performance relationship using traditional physical model, since SLM …
Selective Laser Melting of Stainless Steels: A review of Process, …
Selective laser melting (SLM) is a popular powder-bed fusion process that selectively melts metal powder using a laser beam as shown in Fig. 1 [ 1 ]. Their …
Mechanical properties of 316L four pyramidal lattice structure based on SLM process
Considering the process characteristics of selective laser melting technology(SLM), the standard specimen was printed to complete the experimental study of 316L material properties lattice structure. Four pyramidal lattice structures with different diameter-length ratios and angles between bas were prepared and the mechanical properties of lattice …
Selective Laser Melting of Stainless-Steel: A Review of Process, …
SLM process is one of main technology of AM used to produce metal component from a powder bed. It is resulting from the process of selective laser …
Selective Laser Melting Process
14.2.3.1 Selective laser melting. In early 1990s, selective laser melting (SLM) process was developed and used for producing metallic components; later, in 1999, the first SLM machine was developed by Fockele and Schwarze (F&S) with the support of the Fraunhofer Institute of Laser Technology ILT (Aachen).
About slm process
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