Selective Laser Melting

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (30 June 2017) | Viewed by 29117

Special Issue Editor


E-Mail Website
Guest Editor
RWTH Aachen University - Digital Additive Production Fraunhofer, Institute for Laser Technology ILT Steinbachstr. 15, 52074 Aachen, Germany

Special Issue Information

Dear Colleagues,

Over the last years and decades, “Laser Beam Melting” (LBM)—known as “Selective Laser Melting” (SLM),“3D-printing”, “LaserCusing” and many more—has emerged from pure science, beyond part prototyping, to an individualized production technology. Individualized production is referred to as the manufacturing of products or lots of parts that are uniquely differentiated from one to the other. It is an emerging trend which provides added value and distinction within high value manufacturing: Suppliers can provide more ad hoc, competitive products (according to the customer’s wishes) and deliver new services and localized functionalities (production on demand). Besides individualization, Additive Manufacturing (AM) techniques like LBM enable a huge degree of freedom of geometry and thus enable functionally optimized components to be produced. For these reasons, AM is increasingly making its way into industrial manufacturing chains.
The goal of this Special Issue is to compile a broad range of state-of-the-art contributions in this field into a single collection. Research fields of interest will range from engineering and design, through materials design and process improvements, to fundamental mechanical evaluation of parts produced. I wish to suggest non-exclusively, the following research agenda:
Integration of functions, internal structures, hollow or lattice structures, topology-optimized design as well as monolithic design of former assemblies, light-weight design and manufacture, process and productivity improvements, new materials, material design for AM, process monitoring, quality control, process simulation, applications for series production, process chains, pre- and post-processing of AM-manufactured parts, mechanical properties, microstructure, cracks and defects, etc. to mention just a few.

Univ.-Prof. Dr.-Ing. Dipl.-Wirt. Ing. Johannes Henrich Schleifenbaum
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Selective Laser Melting (SLM)
  • 3D printing
  • design for AM
  • (digital) process chains
  • material properties
  • part quality
  • productivity improvement
  • process monitoring
  • quality control
  • process simulation
  • new materials
  • materials for SLM
  • applications for series production

Published Papers (3 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

Jump to: Other

10878 KiB  
Article
Fatigue Assessment of Ti–6Al–4V Circular Notched Specimens Produced by Selective Laser Melting
by Seyed-Mohammad-Javad Razavi, Paolo Ferro and Filippo Berto
Metals 2017, 7(8), 291; https://doi.org/10.3390/met7080291 - 31 Jul 2017
Cited by 63 | Viewed by 7036
Abstract
Additive manufacturing (AM) offers the potential to economically produce customized components with complex geometries in a shorter design-to-manufacture cycle. However, the basic understanding of the fatigue behavior of these materials must be substantially improved at all scale levels before the unique features of [...] Read more.
Additive manufacturing (AM) offers the potential to economically produce customized components with complex geometries in a shorter design-to-manufacture cycle. However, the basic understanding of the fatigue behavior of these materials must be substantially improved at all scale levels before the unique features of this rapidly developing technology can be used in critical load bearing applications. This work aims to assess the fatigue strength of Ti–6Al–4V smooth and circular notched samples produced by selective laser melting (SLM). Scanning Electron Microscopy (SEM) was used to investigate the fracture surface of the broken samples in order to identify crack initiation points and fracture mechanisms. Despite the observed fatigue strength reduction induced by circular notched specimens compared to smooth specimens, notched samples showed a very low notch sensitivity attributed both to hexagonal crystal lattice characteristics of tempered alpha prime grains and to surface defects induced by the SLM process itself. Full article
(This article belongs to the Special Issue Selective Laser Melting)
Show Figures

Figure 1

10893 KiB  
Article
Structure, Texture and Phases in 3D Printed IN718 Alloy Subjected to Homogenization and HIP Treatments
by Ahmad Mostafa, Ignacio Picazo Rubio, Vladimir Brailovski, Mohammad Jahazi and Mamoun Medraj
Metals 2017, 7(6), 196; https://doi.org/10.3390/met7060196 - 30 May 2017
Cited by 188 | Viewed by 18308
Abstract
3D printing results in anisotropy in the microstructure and mechanical properties. The focus of this study is to investigate the structure, texture and phase evolution of the as-printed and heat treated IN718 superalloy. Cylindrical specimens, printed by powder-bed additive manufacturing technique, were subjected [...] Read more.
3D printing results in anisotropy in the microstructure and mechanical properties. The focus of this study is to investigate the structure, texture and phase evolution of the as-printed and heat treated IN718 superalloy. Cylindrical specimens, printed by powder-bed additive manufacturing technique, were subjected to two post-treatments: homogenization (1100 °C, 1 h, furnace cooling) and hot isostatic pressing (HIP) (1160 °C, 100 MPa, 4 h, furnace cooling). The Selective laser melting (SLM) printed microstructure exhibited a columnar architecture, parallel to the building direction, due to the heat flow towards negative z-direction. Whereas, a unique structural morphology was observed in the x-y plane due to different cooling rates resulting from laser beam overlapping. Post-processing treatments reorganized the columnar structure of a strong {002} texture into fine columnar and/or equiaxed grains of random orientations. Equiaxed structure of about 150 µm average grain size, was achieved after homogenization and HIP treatments. Both δ-phase and MC-type brittle carbides, having rough morphologies, were formed at the grain boundaries. Delta-phase formed due to γ″-phase dissolution in the γ matrix, while MC-type carbides nucleates grew by diffusion of solute atoms. The presence of (Nb0.78Ti0.22)C carbide phase, with an fcc structure having a lattice parameter a = 4.43 Å, was revealed using Energy dispersive spectrometer (EDS) and X-ray diffractometer (XRD) analysis. The solidification behavior of IN718 alloy was described to elucidate the evolution of different phases during selective laser melting and post-processing heat treatments of IN718. Full article
(This article belongs to the Special Issue Selective Laser Melting)
Show Figures

Graphical abstract

Other

Jump to: Research

172 KiB  
Erratum
Erratum: Structure, Texture and Phases in 3D Printed IN718 Alloy Subjected to Homogenization and HIP Treatments. Metals 2017, 7, 196
by Ahmad Mostafa, Ignacio Picazo Rubio, Vladimir Brailovski, Mohammad Jahazi and Mamoun Medraj
Metals 2017, 7(8), 315; https://doi.org/10.3390/met7080315 - 16 Aug 2017
Cited by 4 | Viewed by 2853
Abstract
The authors wish to make the following corrections to the main text in the published paper [1]. In this paper, the weight of CuCl2 should be changed from 5 mg to 5 g to provide accurate recipe for the IN718 etchant.[...] Full article
(This article belongs to the Special Issue Selective Laser Melting)
Back to TopTop