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Applied Sciences
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Novel Advances in Precision Machining and Manufacturing
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Novel Advances in Precision Machining and Manufacturing

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Mechanical Engineering".

Deadline for manuscript submissions: 30 September 2025 | Viewed by 485

Special Issue Editors

Prof. Dr. Shen-Yung Lin

E-Mail Website
Guest Editor
Department of Mechanical and Computer-Aided Engineering, National Formosa University, Yunlin 63201, Taiwan
Interests: cutting of difficult-to-cut materials; vibration and noise; modal analysis; structural design; machining dynamic monitoring
Prof. Dr. Shih-Ming Wang

E-Mail Website
Guest Editor
Department of Mechanical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
Interests: smart manufacturing; on-line intelligent monitoring and control; error measurement and compensation; machining dynamics and application; precision machine design and analysis
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Deshin Liu

E-Mail Website
Guest Editor
Department of Mechanical Engineering, National Chung Cheng University, Chiayi 62102, Taiwan
Interests: electronic packaging; impact science; computer-aided engineering design; computational science

Special Issue Information

Dear Colleagues,

Recent advancements in high-speed cutting technologies have transformed machining processes, significantly enhancing both their speed and precision while reducing costs. Innovations in precision cutting now include micro-nano-level surface machining, crucial for meeting exacting standards in fields such as optics and biomedical engineering. Simultaneously, the development of new alloys and composites has expanded manufacturing possibilities, offering lightweight properties alongside resilience to extreme conditions. Progress has also been achoieved in the realm of additive manufacturing technologies like 3D printing, facilitating rapid prototyping and the production of complex components to meet customized demands. Moreover, the field of precision cutting and manufacturing is increasingly focused on sustainability, adopting green techniques and waste reduction strategies to minimize environmental impact, energy consumption, and carbon emissions.

In summary, these advancements not only broaden the applications of technologies and materials in manufacturing but also significantly improve efficiency, quality, and sustainability, propelling the entire industry forward.

Prof. Dr. Shen-Yung Lin
Prof. Dr. Shih-Ming Wang
Prof. Dr. Deshin Liu
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. Applied Sciences 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 2400 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

  • precision machining
  • additive manufacturing
  • 3D printing

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Published Papers (1 paper)

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Research

28 pages, 17994 KiB  
Article
Analysis of Milling Performance of High-Entropy Alloys with Different Elemental Ratios Subject to the Assistance of Various Ultrasonic Systems
by Shen-Yung Lin and Bo-Chun Chen
Appl. Sci. 2025, 15(7), 3848; https://doi.org/10.3390/app15073848 - 1 Apr 2025
Viewed by 179
Abstract
High-entropy alloys (HEAs) possess multi-element composition and uniform structure, exhibiting superior microstructure and properties compared to traditional alloys. However, the multi-element composition of HEAs results in a complex internal composition configuration with exceptionally high hardness and strength, leading to various machining defects under [...] Read more.
High-entropy alloys (HEAs) possess multi-element composition and uniform structure, exhibiting superior microstructure and properties compared to traditional alloys. However, the multi-element composition of HEAs results in a complex internal composition configuration with exceptionally high hardness and strength, leading to various machining defects under cutting loading such as poor surface roughness, excessive machining temperature, and cutting tool wear. This study investigates the milling performance of FeCoNiCrMnx HEAs with different elemental ratios subjected to various ultrasonic-assisted milling techniques, aiming to identify the better ultrasonic assisted technique and machining process parameters. The ultrasonic-assisted milling techniques include single-axis ultrasonic, dual-axis ultrasonic, and triple-axis ultrasonic. The side milling experiments were performed on three different elemental ratios of HEAs, e.g., FeCoNiCrMn0.1, FeCoNiCrMn0.5, and FeCoNiCrMn1.0 workpieces. The study is divided into two phases. Each alloy workpiece undergoes side-milling experiments using two designated combinations of feed rate and radial cutting depth subjected to various ultrasonic-assisted milling techniques in the first phase. The purpose is to identify which ultrasonic-assisted milling technique may provide the better surface quality for different elemental ratios and to analyze the performance of various cutting condition combinations in terms of surface roughness and cutting tool wear. Based on the results of the first phase, the better ultrasonic-assisted milling technique is selected and an L9 Taguchi orthogonal array is then employed for process parameter planning, by varying spindle speed, feed rate, and radial cutting depth to investigate the effects of different process parameter combinations on machining performance of HEAs with different elemental ratios. The results show that ultrasonic assistance significantly improves the cutting performance in aspects such as reduction of cutting force and cutting tool wear, and the surface quality of alloys with high Mn content. In the first phase experiment, as compared to milling without assistance, the surface roughness may be reduced up to approximately 17.86% by single-axis ultrasonic-assisted milling using the Set 1 process parameters for different elemental ratios, while it achieves up to approximately 34.4% in surface roughness and approximately 17.68% in cutting tool wear using the Set 2 process parameters. The results from the second phase of experiments reveal a more moderate fluctuation of surface roughness and an approximate reduction from 22.03% to 314.27%, with an approximate reduction from 3.64% to 54.45% in cutting force, and an approximate reduction from 0.58% to 94.77% in cutting tool wear for the higher Mn content alloy in contrast to the lower Mn content one. The integrity of the surface morphology is significantly improved as the elemental ratio, x, is increased to 1.0, resulting in a reduction in machined surface deformation and more consistent milling marks on the machined surface, which indicates a higher stable state of machining quality. Full article
(This article belongs to the Special Issue Novel Advances in Precision Machining and Manufacturing)
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