Special Issue "Perspectives on Additively Manufactured Metallic Materials"
A special issue of Materials (ISSN 1996-1944).
Deadline for manuscript submissions: closed (31 August 2017)
Assoc. Prof. Dr. Amir A. Zadpoor
Recent advances in additive manufacturing (AM) techniques offer many opportunities in terms of design freedom. Complex geometries that could not be easily manufactured using conventional techniques are relatively easy to manufacture using AM. AM of metals has been receiving particular attention, because functional parts in the various industrial sectors can now be fabricated using AM techniques. This Special Issue is, therefore, dedicated to the various areas of research relevant to metal AM. The processing parameters are known to be particularly important in metal AM. The relationship between processing parameters and the resulting microstructure and mechanical properties is one of the most important aspects that need to be studied. Process monitoring and (real-time) adaptation of processing parameters are also of great importance to enable first-time-right AM of metals. Furthermore, the quasi-static and fatigue behavior of AM metallic materials are not yet well understood and will be also covered in this Special Issue. Designer materials, where the microstructure and, thus, mechanical properties of AM materials are (locally) ‘designed’ and achieved through adjustment of processing parameters are also of interest. Finally, AM of new materials, development and improvement of new AM processes and systems, standardization of AM processes and materials, quality control in metal AM, metal powder characterization and standardization, and the other relevant aspects of metal AM are also of interest.
Assoc. Prof. Dr. Amir A. Zadpoor
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 papers will be 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. Materials 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 1500 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.
- Additive manufacturing
- 3D printing
- Metallic materials;
- Microstructure-property relationship
- Designer materials
- First-time-right additive manufacturing
- New metal additive manufacturing processes and systems
- AM of new materials
- Standardization and quality control in metal additive manufacturing
- Mechanical behavior of additively manufactured metallic materials including quasi-static mechanical properties, fatigue resistance (crack initiation and propagation), and fracture mechanisms
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Type of Paper: Article
Title: Functionalization of biomedical Ti6Al4V via in-situ alloying by Cu during DMLS manufacturing
Authors: P. Krakhmalev 1, A. Kinnear 2, T. C. Dzogbewu 2, I. Yadroitsava 2, I.Yadroitsev 2
1 Karlstad University, Department of Engineering and Physics, Sweden
2 Central University of Technology, Free State, Department of Mechanical and Mechatronic Engineering, Bloemfontein, South Africa
Abstract: Direct Metal Laser Sintering allows design and manufacturing of new alloys made of elemental and alloy powders with limited solubility via in-situ alloying. For example, Ti6Al4V-Cu alloys combine advantages of biomedical Ti6Al4V and antibacterial properties of Cu. In this investigation Ti6Al4V(ELI)-1at.%Cu was manufactured by DLMS with process-parameters and scanning strategy optimized to enhance alloy homogeneity. Microstructure and mechanical properties of new alloy were investigated. Future work entails investigation focused on the effect of Cu content on microstructure, properties, antibacterial efficiency and cytotoxicity of Ti6Al4V-xCu alloys. The ultimate task is to manufacture advanced implants and conduct microbiological tests.
Type of Paper: Article
Title: 3D printing of polymer-metal hybrid materials by fused deposition modeling
Authors: Nils Grimmelsmann, Susanna Fafenrot, Andrea Ehrmann
Abstract: Fused deposition modeling (FDM) is a 3D printing technology usually performed with polymers which are molten in a printer nozzle and placed line by line on the printing bed or the previous layer, respectively. Nowadays, hybrid materials combining polymers with functional materials are also commercially available. Especially combinations of polymers with metal particles result in printed objects with interesting optical and mechanical properties.The proposed article deals with examinations of mechanical properties of objects 3D printed from polymer-metal hybrid materials in comparison with pure metal objects as well as polymeric materials, produced in different technologies.
Type of Paper: Article
Title: Predictive Simulation of Process Windows for Powder Bed Based Additive Manufacturing
Authors: A. M. Rausch 1, V. E. Forster 1, C. Pobel 1, M. Markl 1, C. Körner 1
1. Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Department of Materials Science and Engineering, Chair of Materials Science and Engineering for Metals (WTM), Martensstr. 5, D-91058 Erlangen, Germany
Abstract: The mechanical properties of parts fabricated by powder bed based additive manufacturing processes are closely related to their porosity, local composition and microstructure. Depending on the process parameters, phenomena such as channel-like porosities with a height up to several millimeters, phase composition changes due to high evaporation losses or anisotropic properties due to a textured microstructure can occur. These experimental observations are combined into a process window. The main objective of this work is to validate the predictive capabilities of our numerical simulation tool. The investigations demonstrate the unique capability of simulating macroscopic domains with sample sizes in the range of millimeters with a mesoscopic approach resolving the stochastic powder bed and the hydrodynamics of the melt pool. Simulated process windows reveal regular porosity, the stochastics of channel-like porosity and composition changes within the part which is not accessible with macroscopic approaches. The numerical findings reproduce the main experimental observations of sample process windows of selective electron beam melted Ti-6Al-4V and demonstrate the predictive power of our simulation tool.
Title: Effect of thermal field transformation on microstructure in selective laser melting
Authors: Ketai He1*, Shuang Luo1, Yili Hong2*, Zhehan Chen1
1) School of Mechanical Engineering, University of Science and Technology Beijing, 100083
2) Department of Statistics, Virginia Polytechnic Institute and State University, 24060
Abstract: Considering the environment factors, there are no absolute same pieces in selective laser melting(SLM), so it is difficult to reproduce defaults in product. Because the physical phenomena occur over a broad range of length and time scales and there are so many process parameters in SLM, the time cost and material cost are high to find rules that defaults occur by doing experiments and simulations. Most mechanical properties have strong relationships with microstructure. Microstructure is one important factor that affects the mechanical features of metal part and different transformation of thermal field will result different microstructure. Therefore, in this paper some research work has been done to find the mechanism of microstructure generation in SLM. Some experiments are designed and done to find the effects of thermal field transformation on microstructure in SLM. Firstly, different scanning paths are taken and the thermal field of every layer is recorded; secondly, the microstructures of the parts are got with scanning electron microscope(SEM); thirdly, data mining and statistical analysis technology is used to analyze the effect of thermal field transformation on microstructure.