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Metals
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Laser Powder Bed Fusion Process in Alloy Manufacturing
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Laser Powder Bed Fusion Process in Alloy Manufacturing

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

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 2472

Special Issue Editor

Dr. Mehmet E. Kartal

E-Mail Website
Guest Editor
University of Aberdeen, Aberdeen, United Kingdom
Interests: Tribology; Micromechanics; Residual Stress; Experimental Mechanics

Special Issue Information

Dear Colleagues,

Laser Powder Bed Fusion (LPBF), also generally referred to Selective Laser Melding, is a 3D metal printing method in which 3D components are fabricated by means of a high-energy laser beam to fuse the pre-deposited metal powder. LPBF has been increasingly used in many sectors of industry due to its ability to produce near-net shape parts directly from a CAD model and hence offering robust design flexibility without the limitations of conventional manufacturing methods that include a series of manufacturing processes, more material consumption, higher cost and energy. LPBF is one of the most continuously developing technologies with vast innovative potential and therefore, it is the subject of intensive scientific research, particularly in the areas of manufacturing strategies and their effect on LPBF produced parts. 

The aim of this Special Issue is to highlight recent innovations introduced in the Laser Powder Bed Fusion process and their impact on the mechanical and/or material behavior of metals and alloys by experimental techniques and/or modelling at all length scales down to nanostructures.

Scholars are encouraged to submit research papers and reviews to this Special Issue: Laser Powder Bed Fusion Process in Alloy Manufacturing.

Dr. Mehmet E. Kartal
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

  • Porosity, Microstructure and Materials Characterization
  • Mechanical Properties
  • Fracture
  • Fatigue
  • Residual Stress
  • Contact Mechanics and Tribology
  • Corrosion

Published Papers (1 paper)

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Research

17 pages, 12179 KiB  
Article
On the Grain Microstructure–Mechanical Properties Relationships in Aluminium Alloy Parts Fabricated by Laser Powder Bed Fusion
by Pavel A. Somov, Eugene S. Statnik, Yuliya V. Malakhova, Kirill V. Nyaza, Alexey I. Salimon, Dmitry K. Ryabov and Alexander M. Korsunsky
Metals 2021, 11(8), 1175; https://0-doi-org.brum.beds.ac.uk/10.3390/met11081175 - 24 Jul 2021
Cited by 2 | Viewed by 2010
Abstract
Recent years witnessed progressive broadening of the practical use of 3D-printed aluminium alloy parts, in particular for specific aerospace applications where weight saving is of great importance. Selective laser melting (SLM) is an intrinsically multi-parametric fabrication technology that offers multiple means of controlling [...] Read more.
Recent years witnessed progressive broadening of the practical use of 3D-printed aluminium alloy parts, in particular for specific aerospace applications where weight saving is of great importance. Selective laser melting (SLM) is an intrinsically multi-parametric fabrication technology that offers multiple means of controlling mechanical properties (elastic moduli, yield strength, and ductility) through the control over grains size, shape, and orientation. Targeted control over mechanical properties is achieved through the tuning of 3D-printing parameters and may even obviate the need of heat treatment or mechanical post-processing. Systematic studies of grain structure for different printing orientations with the help of EBSD techniques in combination with mechanical testing at different dimensional levels are the necessary first steps to implement this agenda. Samples of 3D-printable Al-Mg-Si RS-333 alloy were fabricated in three orientations with respect to the principal build direction and the fast laser beam scanning direction. Sample structure and proper-ties were investigated using a number of techniques, including EBSD, in situ SEM tensile testing, roughness measurements, and nanoindentation. The as-printed samples were found to display strong variation in Young’s modulus values from nanoindentation (from 43 to 66 GPa) and tensile tests (from 54 to 75 GPa), yield stress and ultimate tensile strength (100–195 and 130–220 MPa) in different printing orientations, and almost constant hardness of about 0.8 GPa. A further preliminary study was conducted to assess the effect of surface finishing on the mechanical performance. Surface polishing was seen to reduce Young’s modulus and yield strength but improves ductility, whereas the influence of sandblasting was found to be more controversial. The experimental results are discussed in connection with the grain morphology and orientation. Full article
(This article belongs to the Special Issue Laser Powder Bed Fusion Process in Alloy Manufacturing)
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