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Non-destructive Evaluation and Analysis of Materials after Manufacturing
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Non-destructive Evaluation and Analysis of Materials after Manufacturing

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

Deadline for manuscript submissions: closed (20 August 2022) | Viewed by 5994

Special Issue Editors

Prof. Dr. Andrej Czán

E-Mail Website
Guest Editor
Department of Machining and Manufacturing Technology, University of Zilina, Zilina, Slovakia
Interests: implementation of progressive and innovative production technologies; non-destructive detection technologies
Dr. Michal Šajgalík

E-Mail Website
Guest Editor
Department of Machining and Manufacturing Technology, University of Zilina, Zilina, Slovakia
Interests: machining technologies; non-destructive evaluation of component functionality; construction of technological jigs and tools; progressive contactless technologies;

Special Issue Information

Dear Colleagues,

The present time brings ever-increasing demands for quality and functionality of components also in industry. Surface integrity is a broad term that includes a wide range of material properties (such as stress states, microstructure, surface quality, surface resistance, mechanical properties of a material, etc.). Thorough knowledge of the mentioned properties of materials and their surfaces after manufacturing is one of the important prerequisites for guaranteeing the quality of the product. Quality requirements are justified for each product, but especially where there are increased demands on functional properties, e.g., automotive, aerospace, bearing industries, and medical, too. Based on these facts and also efforts for continuous progress, it is necessary to look for such methods of evaluation and analysis of materials that will quickly and effectively determine the current state of materials and surfaces of components after production.

The focus of this Special Issue is therefore primarily on (but not limited to) non-destructive methods for the evaluation and analysis of materials, their surfaces and functional and utility properties using the various technologies used in the manufacturing process.

We will be honoured if you contribute to this issue with your contribution and thus contribute to new approaches to improving production processes, materials and quality of products for quality devices and constructions.

Prof. Dr. Andrej Czán
Dr. Michal Šajgalík
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

  • non-destructive analysis
  • surface integrity
  • microstructure of material
  • surface roughness
  • additive manufacturing
  • machining
  • welding
  • heat treatment
  • forming

Published Papers (2 papers)

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Research

24 pages, 12887 KiB  
Article
A Comparative Study of Corrosion AA6061 and AlSi10Mg Alloys Produced by Extruded and Additive Manufacturing
by Francisco Estupiñan-López, Citlalli Gaona-Tiburcio, Jesús Jáquez-Muñoz, Patricia Zambrano-Robledo, Erick Maldonado-Bandala, José Cabral-Miramontes, Demetrio Nieves-Mendoza, Anabel D. Delgado, Juan Pablo Flores-De los Rios and Facundo Almeraya-Calderón
Materials 2021, 14(19), 5793; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14195793 - 03 Oct 2021
Cited by 2 | Viewed by 2101
Abstract
The aim of this work was to evaluate the corrosion behavior of the AA6061 and AlSi10Mg alloys produced by extruded and additive manufacturing (selective laser melting, SLM). Alloys were immersed in two electrolytes in H2O and 3.5 wt. % NaCl solutions [...] Read more.
The aim of this work was to evaluate the corrosion behavior of the AA6061 and AlSi10Mg alloys produced by extruded and additive manufacturing (selective laser melting, SLM). Alloys were immersed in two electrolytes in H2O and 3.5 wt. % NaCl solutions at room temperature and their corrosion behavior was studied by electrochemical noise technique (EN). Three different methods filtered EN signals, and the statistical analysis was employed to obtain Rn, the localization index (LI), Kurtosis, skew, and the potential spectral density analysis (PSD). The Energy Dispersion Plots (EDP) of wavelets method was employed to determine the type of corrosion and the Hilbert–Huang Transform (HHT), analyzing the Hilbert Spectra. The result indicated that the amplitude of the transients in the time series in potential and current is greater in the AlSi10Mg alloy manufactured by additive manufacturing. The amplitude of the transients decreases in both alloys (AA6061 and AlSi10Mg) as time increases. Full article
(This article belongs to the Special Issue Non-destructive Evaluation and Analysis of Materials after Manufacturing)
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18 pages, 7105 KiB  
Article
Evaluation of Thermal Damage Impact on Microstructure and Properties of Carburized AISI 9310 Gear Steel Grade by Destructive and Non-Destructive Testing Methods
by Kamil Dychtoń, Andrzej Gradzik, Łukasz Kolek and Krzysztof Raga
Materials 2021, 14(18), 5276; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14185276 - 14 Sep 2021
Cited by 8 | Viewed by 3270
Abstract
Advanced aircraft gearboxes operate under high mechanical loads. Currently, aircraft gears are manufactured from chromium–nickel–molybdenum steel grades such as AISI 9310 or Pyrowear 53. The major causes of gear failure are wear and fatigue cracking. As the crack initiation occurs predominantly on the [...] Read more.
Advanced aircraft gearboxes operate under high mechanical loads. Currently, aircraft gears are manufactured from chromium–nickel–molybdenum steel grades such as AISI 9310 or Pyrowear 53. The major causes of gear failure are wear and fatigue cracking. As the crack initiation occurs predominantly on the component surface, the gears are routinely subjected to surface hardening processes such as low-pressure carburizing and case hardening. The gears are manufactured in a multiple operation process, in which teeth grinding is a crucial step. Selection of improper grinding conditions can lead to local heat concentration and creation of grinding burns, which are small areas where microstructure and properties changes are induced by high temperature generated during grinding. Their presence can lead to significant reduction of gear durability. Therefore destructive and non-destructive (NDT) quality-control methods such as chemical etching or magnetic Barkhausen noise (MBN) measurements are applied to detect the grinding burns. In the area of a grinding burn, effects related to the over-tempering or re-hardening of the carburized case may occur. In this paper, the results of the studies on the characterization of microstructure changes caused by local heating performed to simulate grinding burns are presented. The areas with the over-tempering and re-hardening effects typical for grinding burns were formed by laser surface heating of carburized AISI 9310 steel. Analyses of the microstructure, residual stresses, retained austenite content, and non-destructive testing by the MBN method were performed. The correlation between the MBN value and the properties of the modified surface layer was identified. It was also found that the re-hardened areas had similar characteristics of changes in the Barkhausen noise intensity, despite the significant differences in the width of the overheated zone, which depended on the laser-heating process conditions. Full article
(This article belongs to the Special Issue Non-destructive Evaluation and Analysis of Materials after Manufacturing)
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