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Micromachines
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Micromachining Method for Surface Morphology, Volume II
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Micromachining Method for Surface Morphology, Volume II

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D：Materials and Processing".

Deadline for manuscript submissions: closed (20 December 2022) | Viewed by 3813

Special Issue Editors

Dr. Sunil Pathak

E-Mail Website
Guest Editor
HiLASE Centre, Institute of Physics, Czech Academy of Sciences, Za Radnicí 828, 25241 Dolní Brežany, Czech Republic
Interests: laser materials processing; surface engineering; laser shock peening; laser annealing; additive manufacturing
Special Issues, Collections and Topics in MDPI journals
Dr. Jagdheesh Radhakrishnan

E-Mail Website
Guest Editor
Depto. Física Aplicada e Ingeniería de Materiales, E.T.S. de Ingenieros Industriales Universidad Politécnica de Madrid, 28006 Madrid, Spain
Interests: micromachining; precision engineering; surface engineering; micro-finishing/polishing; surface integrity
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

For several years, micromachining and precision finishing processes have been well developed and reported as methods for removing burrs, improving edge contour, and smoothing and polishing components. These methods are often used to facilitate safer part handling (by attenuating sharp part edges), enhance the fit and function of parts when installed, and create smooth, even micro-finished surfaces to satisfy either functional or aesthetic requirements or standards. This Special Issue aims to highlight the recent advancements in micromachining processes used for improving the surface morphology and important surface engineering aspects. Recent research and critical reviews are welcome to be the part of this Special Issue.

Topics include, but are not limited to, the following:

  • Laser micromachining and cutting of complex shaped components and features;
  • Precision machining;
  • Micro manufacturing and meso- and micro-scale additive manufacturing;
  • Micro-machining for biomedical industry;
  • Machining of micro-channels and pillars by spark erosion;
  • Laser, ultrasonic and abrasive water jet machining;
  • Precision machining of additive manufactured components;
  • Laser induced periodic surface structures in nanoscale;
  • Tribological effects of machining on the micro manufactured components;
  • Modelling and optimization of precision micro-machining and finishing for surface integrity enhancement;
  • Hybrid machining and finishing for micro and meso parts;
  • Micro- and nano-machining for MEMS;
  • Effects of precision micro-machining and finishing on geometric accuracy, tribology, and surface integrity of engineered parts engineering;
  • Precision machining and finishing of glass, ceramics, and non-metals, Micro/nano finishing of ultra-finished optical components.

Dr. Sunil Pathak
Dr. Jagdheesh Radhakrishnan
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. Micromachines 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

  • micromachining
  • precision engineering
  • surface engineering
  • micro-finishing/polishing
  • surface integrity
  • ultrafast laser micromachining

Related Special Issue

Published Papers (2 papers)

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Research

20 pages, 7017 KiB  
Article
Evaluation of a High-Temperature Pre-Heating System Design for a Large-Scale Additive Manufacturing System
by Rabelani Duncan Ramulifho, Kapil Gupta and Daniel Glaser
Micromachines 2022, 13(9), 1475; https://doi.org/10.3390/mi13091475 - 05 Sep 2022
Viewed by 1425
Abstract
Additive Manufacturing (AM) of titanium (Ti6Al4V) material using Selective Laser Melting (SLM) may generate significant residual stresses of a tensile nature, which can cause premature component failure. The Aeroswift platform is a large volume AM machine where a high-temperature substrate preheating system is [...] Read more.
Additive Manufacturing (AM) of titanium (Ti6Al4V) material using Selective Laser Melting (SLM) may generate significant residual stresses of a tensile nature, which can cause premature component failure. The Aeroswift platform is a large volume AM machine where a high-temperature substrate preheating system is used to mitigate high thermal gradients. The current machine platform is unable to achieve a target build-plate temperature of 600 °C. This study focuses on the analysis of the preheating system design to determine the cause of its inefficiency, and the experimental testing of key components such as the heater and insulation materials. A Finite Element Analysis (FEA) model shows the ceramic heater achieves a maximum temperature of 395 °C, while the substrates (build-plates) only attain 374 °C. Analysis showed that having several metal components in contact and inadequate insulation around the heater caused heat loss, resulting in the preheating system’s inefficiency. Additionally, experimental testing shows that the insulation material used was 44% efficient, and a simple insulated test setup was only able to obtain a maximum temperature of 548.8 °C on a 20 mm thick stainless steel 304 plate, which illustrated some of the challenges faced by the current pre-heating design. New design options have been developed and FEA analysis indicates that a reduction in heat loss through improved sub-component configurations can obtain 650 °C degrees above the substrate without changing the heating element power. The development and challenges associated with the large-scale preheating system for AM are discussed, giving an insight into improving its performance. Full article
(This article belongs to the Special Issue Micromachining Method for Surface Morphology, Volume II)
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10 pages, 4164 KiB  
Article
Facile Manufacture of Oxide-Free Cu Particles Coated with Oleic Acid by Electrical Discharge Machining
by Irshad Ahamad Khilji, Siti Nadiah Binti Mohd Safee, Sunil Pathak, Chaitanya Reddy Chilakamarry, Amiril Sahab Bin Abdul Sani and Venugopal Jayarama Reddy
Micromachines 2022, 13(6), 969; https://doi.org/10.3390/mi13060969 - 19 Jun 2022
Cited by 2 | Viewed by 1963
Abstract
Particle synthesis has seen significant advances in current trends. However, the synthesis of metal particles without oxidation is a challenge for researchers. The current study presents a straightforward, convenient, and convincing approach for manufacturing copper (Cu) particles free of surface oxide. The die-sink [...] Read more.
Particle synthesis has seen significant advances in current trends. However, the synthesis of metal particles without oxidation is a challenge for researchers. The current study presents a straightforward, convenient, and convincing approach for manufacturing copper (Cu) particles free of surface oxide. The die-sink Electrical Discharge Machine (EDM) of copper alloys with oleic acid resulted in the formation of Cu particles with diameters between 10 to 20 µm. X-ray diffraction (XRD) was used for particle examination after cleaning and sonication with distilled water. Cu particles with oleic acid coating retained a Cu phase without oxidation after synthesis. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were used to determine the size and morphology of generated particles. Fourier transforms infrared (FT-IR) analysis revealed the oleic acid-coated Cu surface bonded with an oxygen atom. Also, the agglomeration and change of size involving Cu particles with increasing voltages in the pulse supply in EDM were reported. Full article
(This article belongs to the Special Issue Micromachining Method for Surface Morphology, Volume II)
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