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Metals
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Selective Laser Melting: State-of-the-Art 2022
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Selective Laser Melting: State-of-the-Art 2022

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Additive Manufacturing".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 2296

Special Issue Editor

Dr. Rizwan Abdul Rahman Rashid

E-Mail Website1 Website2
Guest Editor
School of Engineering, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
Interests: advanced manufacturing; laser-based material processing; additive and subtractive manufacturing; materials and mechanical characterisation; light metals and alloys; surface engineering; antibacterial coatings

Special Issue Information

Dear Colleagues,

Selective laser melting (SLM), one of the most common metal additive manufacturing (AM) processes, is a layer-by-layer fabrication process where each powder layer is melted and fused by a laser beam that traverses over the designated CAD part’s geometry. Therefore, it is used to manufacture end products of intricate geometry for the automobile, aerospace, defense, and biomedical industries. However, SLM is a very complex process involving variables that are machine-, material-, and process-related. The characteristics of the printed part are heavily dependent upon the optimization of these parameters, which would otherwise result in poor part properties. Moreover, the printed part, in most cases, require subsequent post-processing treatments to suit the desired applications. To date, significant research has been carried out to not only develop the SLM process for the fabrication of various materials but also to standardize the SLM process for widespread industrial applications. This Special Issue plans to discuss the most recent advances in SLM, thereby providing a state-of-the-art platform for the dissemination of scientific and industrial research. Potential topics include, but are not limited to advances in SLM machine design and processing; novel printable and/or functional materials; modelling, simulation, and validation of SLM process characteristics and print-part properties; in situ and/or post-print processing; in-process/real-time monitoring and non-destructive evaluation; case studies on industrial applications.

 

Dr. Rizwan Abdul Rahman Rashid
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
  • materials characterization
  • mechanical performance
  • novel materials
  • functional materials
  • post-processing
  • process monitoring

Published Papers (1 paper)

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Research

26 pages, 9437 KiB  
Article
Design Optimization and Finite Element Model Validation of LPBF-Printed Lattice-Structured Beams
by Riyan Rashid, Syed Masood, Dong Ruan, Suresh Palanisamy, Xiaodong Huang and Rizwan Abdul Rahman Rashid
Metals 2023, 13(2), 184; https://doi.org/10.3390/met13020184 - 17 Jan 2023
Cited by 7 | Viewed by 1826
Abstract
The laser powder bed fusion (LPBF) method, more commonly known as selective laser melting (SLM), is one of the most common metal additive manufacturing (AM) processes. It is a layer-by-layer fabrication process where each powder layer is melted and fused by a laser [...] Read more.
The laser powder bed fusion (LPBF) method, more commonly known as selective laser melting (SLM), is one of the most common metal additive manufacturing (AM) processes. It is a layer-by-layer fabrication process where each powder layer is melted and fused by a laser beam, which traverses over the designated part geometry cross-section, as defined by a sliced CAD model. The LPBF process is being popularly used to manufacture end products of intricate geometry for various industries, such as the automobile, aerospace, defence, and biomedical industries. In designing parts, the topology optimisation (TO) technique can be effectively employed to optimise the distribution of material throughout the part and obtain the minimum volume/weight without compromising the mechanical performance of the component. This study focusses on the design optimisation and validation of the optimisation approaches used for LPBF-printed AlSi12 metal parts. The mechanical performance of three different topologically optimised lattice beams, viz. 1 × 1, 8 × 3, and 12 × 3, printed using the LPBF process, was investigated. When the beams were tested in bending, it was found that these TO LPBF-printed beams behaved differently when compared to the LPBF-printed solid beam. The 1 × 1 lattice beam performed better than the other two lattice beams due to the lower number of links where premature failure was delayed. The 1 × 1 lattice beam exhibited a load-bearing capacity of 17 ± 2 kN, whereas the 8 × 3 and 12 × 3 lattice beams showed load capacities of 13 ± 1 kN and 10 ± 1 kN, respectively. This mechanical behaviour was modelled and simulated by using a finite element analysis, and it was found that the LPBF-printed material property was affected by the design elements present in the beam. It was also found that each topology-optimised beam fits a different material model when compared to the SLM-printed solid beam. Therefore, a new material model or simulation technique needs to be developed to overcome this issue. Full article
(This article belongs to the Special Issue Selective Laser Melting: State-of-the-Art 2022)
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