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Nonconventional Technology in Materials Processing-3rd Edition
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Nonconventional Technology in Materials Processing-3rd Edition

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: 20 October 2024 | Viewed by 3008

Special Issue Editors

Prof. Dr. Rafał Świercz

E-Mail Website
Guest Editor
Institute of Manufacturing Technology, Faculty of Production Engineering, Warsaw University of Technology, Narbutta 85, 02-524 Warsaw, Poland
Interests: electrical discharge machining; noncoventional technology; surface finishing technology; surface metrology; characteristics of material properties; nanomaterials; experimental and simulative analysis of manufacturing processes; optimization of manufacturing processes
Special Issues, Collections and Topics in MDPI journals
Dr. Dorota Oniszczuk-Świercz

E-Mail Website
Guest Editor
Institute of Manufacturing Technology, Faculty of Production Engineering, Warsaw University of Technology, Narbutta 85, 02-524 Warsaw, Poland
Interests: electrical discharge machining; wire; tool wear
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Advances in the engineering of materials have resulted in the introduction of new materials suitable for selected industries. The development of proper machining methods for modern materials, for example, is critically important for their implementation in aerospace, automobile, or machinery industries. In recent years, the involvement of multidisciplinary teams in the application of nonconventional technology, including electrical discharge machining, electrochemical machining, additive manufacturing, abrasive finishing, hybrid manufacturing, or laser processing, in the precise manufacturing of difficult-to-cut material has considerably increased.

The main aim of this Special Issue is to present recent advances in the field of nonconventional technology centered around the processing of materials.

This Special Issue includes high-quality original research papers, review papers, and case studies that deal with the investigation, modeling, optimization, and simulation of nonconventional technology centered around the processing of materials.

It is my pleasure to invite you to submit original research papers, short communications, and state-of-the-art reviews for this Special Issue.

Prof. Dr. Rafał Świercz
Dr. Dorota Oniszczuk-Świercz
Guest Editors

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. Materials is an international peer-reviewed open access semimonthly 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

  • nonconventional manufacturing processes
  • electrical discharge machining
  • electrochemical machining
  • abrasive finishing
  • modelling and simulation
  • optimization
  • additive manufacturing

Published Papers (4 papers)

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Research

22 pages, 9939 KiB  
Article
A Simplified Analytical Model for Strip Buckling in the Pressure-Assisted Milling Process
by Xuezhi Wang, Kelin Chen, Yanli Lin and Zhubin He
Materials 2024, 17(15), 3739; https://doi.org/10.3390/ma17153739 - 28 Jul 2024
Viewed by 299
Abstract
A simplified column-buckling model is developed to understand the buckling mechanism of thin-walled strips restrained by uniform lateral pressure in the milling process. The strip is simplified as two rigid columns connected by a rotation spring, resting on a smooth surface, restrained by [...] Read more.
A simplified column-buckling model is developed to understand the buckling mechanism of thin-walled strips restrained by uniform lateral pressure in the milling process. The strip is simplified as two rigid columns connected by a rotation spring, resting on a smooth surface, restrained by a uniform pressure and loaded by an axial force. Two loading cases are considered, i.e., the dead load and the follower load. Analytical solutions for the post-buckling responses of the two cases are derived based on the energy method. The minimum buckling force, Maxwell force and stability conditions for the two cases are established. It is demonstrated that the application of higher uniform pressure increases the minimum buckling force for the column and thus makes the column less likely to buckle. For the same pressure level, the dead load is found to be more effective than the follower load in suppressing the buckling of the system. The effect of initial geometric imperfection is also investigated, and the imperfection amplitude and critical restraining pressure that prevent buckling are found to be linearly related. The analytical results are validated by finite element simulations. This analytical model reveals the buckling mechanism of strips under lateral pressure restraint, which cannot be explained by the conventional bifurcation buckling theory, and provides a theoretical foundation for buckling-prevention strategies during the milling process of thin-walled strips, plates and shells commonly encountered in aerospace or automotive industries. Full article
(This article belongs to the Special Issue Nonconventional Technology in Materials Processing-3rd Edition)
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21 pages, 16832 KiB  
Article
Experimental Investigation on the Impact of Graphite Electrodes Grain Size on Technological Parameters and Surface Texture of Hastelloy C-22 after Electrical Discharge Machining with Negative Polarity
by Rafał Nowicki, Dorota Oniszczuk-Świercz and Rafał Świercz
Materials 2024, 17(10), 2257; https://doi.org/10.3390/ma17102257 - 10 May 2024
Viewed by 831
Abstract
Electrical discharge machining (EDM) is a rapidly evolving method in modern industry that manufactures highly complex components. The physical properties of a tool electrode material are significant factors in determining the effectiveness of the process, as well as the characteristics of the machined [...] Read more.
Electrical discharge machining (EDM) is a rapidly evolving method in modern industry that manufactures highly complex components. The physical properties of a tool electrode material are significant factors in determining the effectiveness of the process, as well as the characteristics of the machined surfaces. The current trend of implementing graphite tool electrodes in manufacturing processes is observed. Innovative material engineering solutions enable graphite production with miniaturized grain size. However, the correlation between the graphite electrode grain size and the mechanism of the process removal in the EDM is a challenge for its widespread implementation in the industry. This research introduces a new method to evaluate the impact of the graphite electrode grain size and machining parameters on the material removal effectiveness, relative tool wear rate, and surface roughness (Ra) of Hastelloy C-22 following EDM with negative polarity. The study utilized new graphite materials with a grain size of 1 µm (POCO AF-5) and 10 µm (POCO EDM-180). An assessment of the impact of the EDM process parameters on the technological parameters and the development of the surface roughness was carried out. Electrical discharge machining with fine-grained graphite electrodes increases process efficiency and reduces tool wear. Graphite grains detached from the tool electrode affect the stability of electrical discharges and the efficiency of the process. Based on the experimental results, mathematical models were developed, enabling the prediction of machining effects to advance state-of-the-art manufacturing processes. The obtained mathematical models can be implemented in modern industrial EDM machines as guidelines for selecting adequate machining parameters depending on the desired process efficiency, tool wear rate, and surface roughness for advanced materials. Full article
(This article belongs to the Special Issue Nonconventional Technology in Materials Processing-3rd Edition)
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19 pages, 6219 KiB  
Article
The Influence of Variable Stiffness of the Shape Memory Alloys Carbon Composite Structure on Mechanical Vibration
by Damian Markuszewski, Mariusz Wądołowski and Arkadiusz Krajewski
Materials 2024, 17(2), 480; https://doi.org/10.3390/ma17020480 - 19 Jan 2024
Viewed by 698
Abstract
The purpose of this study is to investigate the dynamic properties of new structures formed by combining carbon fiber and epoxy resin-based composite materials with SMA (shape memory alloy) “smart materials” in the form of NiTiNol wire. Such a combination will have an [...] Read more.
The purpose of this study is to investigate the dynamic properties of new structures formed by combining carbon fiber and epoxy resin-based composite materials with SMA (shape memory alloy) “smart materials” in the form of NiTiNol wire. Such a combination will have an impact on the dynamics of the structure, especially in terms of stiffness controllability. Key mechanical parameters such as natural frequency and stiffness, as well as the effect of temperature, were determined through experimental studies. Full article
(This article belongs to the Special Issue Nonconventional Technology in Materials Processing-3rd Edition)
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16 pages, 10751 KiB  
Article
The Influence of Vibro-Assisted Abrasive Processing on the Surface Roughness and Sub-Surface Microstructure of Inconel 939 Specimen Made by LPBF
by Joanna Radziejewska, Michał Marczak, Piotr Maj and Dominik Głowacki
Materials 2023, 16(23), 7429; https://doi.org/10.3390/ma16237429 - 29 Nov 2023
Viewed by 840
Abstract
This paper presents the research results on the influence of vibration abrasive machining parameters on the surface layer integrity of elements made by LPBF technology from Inconel 939. The research was carried out on samples of various sizes on vibrating smoothing machines. The [...] Read more.
This paper presents the research results on the influence of vibration abrasive machining parameters on the surface layer integrity of elements made by LPBF technology from Inconel 939. The research was carried out on samples of various sizes on vibrating smoothing machines. The influence of the size of the processed elements, the type of abrasive shapes, the processing time, and the supporting fluid on the surface roughness and microstructure of the processed elements was analyzed. Tests have shown that as a result of using vibration processing, it is possible to reduce the surface roughness five times to the value of Ra = 1.1 µm. A significant influence of the type of abrasive shapes was found. There was no significant effect of the machining fluid on the process. Full article
(This article belongs to the Special Issue Nonconventional Technology in Materials Processing-3rd Edition)
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