Special Issue "New Alloys, Materials and Processes for Components Working in Energy Equipment"

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Structure Analysis and Characterization".

Deadline for manuscript submissions: 15 October 2021.

Special Issue Editors

Dr. Amaia Calleja-Ochoa
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Guest Editor
University of the Basque Country UPV/EHU & CFAA, The Aeronautics Advanced Manufacturing Center, Bilbao, Spain
Interests: Machining of superalloys; additive manufacturing; welding; coatings; machining; manufacturing of aeroengine components; vibrations in manufacturing processes
Special Issues and Collections in MDPI journals
Prof. Dr. Luis Norberto López De Lacalle
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Guest Editor
Department of Mechanical Engineering (High Performance Manufacturing Group), University of the Basque Country (UPV/EHU), Parque Tecnológico de Zamudio 202, 48170 Bilbao, Spain
Interests: manufacturing process; aeronautics; machine tools; Industry 4.0; machining
Special Issues and Collections in MDPI journals
Prof. Anselmo Eduardo Diniz
Website
Guest Editor
Universidade Estadual de Campinas Fac Mech Engn CAMPINAS, SP, BRAZIL
Interests: Mechanical Engineering; with emphasis on Manufacturing / Machining

Special Issue Information

Dear Colleagues,

Nowadays, energy equipment represents a challenge both for design, materials and manufacturing. The critical aspects of these types of equipment and high added value imply daily research efforts. Turbines, combustion engines, compressors, cogeneration equipment, oil and gas facilities are critical systems.

On one hand, new materials and alloys with improved characteristics (structure, properties and applications) are of great interest in this field. In fact, the evolution of the energy sector is constant, so, efficient machining of difficult-to-cut materials and complex geometries is key to perform the final operations to achieve the precision required. Industry is all time making big efforts in daily continuous improvements. In many cases the evolution is lineal, only from time to time breakthrough advances are expected. In the latter the additive manufacturing is introducing new possibilities.

Machining technology is rich in aspects, aiming at quality and productivity. In fact, cutting tool substrate grades and new coatings to improve quality and productivity are launched to the market in a daily basis. In the same line, new superalloys and composites bring extra challenges to manufacturing industry, Additionally, sustainability is also a concern, and green approaches are proposed, such as reduction of coolant, energy consumption reduction, and recycling of chips and even recycling of  cutting tool substrates. Tungsten for instance is a critical raw material, and alternatives based on ceramics or extra-hard materials are defined.

The special issue is open to new findings and approaches, taking into account the following points:

  • New superalloys and materials used in energy equipment
  • Surface integrity and damage by manufacturing methods
  • Intermetallic alloys (structure, properties and applications)
  • Benchmarking of machining processes
  • Solutions for difficult-to-cut alloys
  • Machine tools for high performance machining
  • Coatings and new grades for tool materials
  • Tool wear and tool life
  • New lubricoolant approaches
  • Sustainability in machining: green machining
  • Additive manufacturing in energy equipment

New design and reliability methods for the full system life cycle

Dr. Amaia Calleja-Ochoa
Prof. Norberto López de Lacalle Marcaide
Prof. Anselmo Eduardo Diniz
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 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 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 2000 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

  • alloys
  • composites
  • manufacturing
  • machining
  • intermetallic
  • turbines
  • oil and gas

Published Papers (1 paper)

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Research

Open AccessArticle
Analysis of the Part Distortions for Inconel 718 SLM: A Case Study on the NIST Test Artifact
Materials 2020, 13(22), 5087; https://doi.org/10.3390/ma13225087 - 11 Nov 2020
Abstract
The present paper evaluates the misalignment and geometry distortion of the standard National Institute of Standards and Technology (NIST) test artifact in Inconel 718 alloy, when several layers with and without supports are employed to manufacture it by the Selective Laser Melting (SLM) [...] Read more.
The present paper evaluates the misalignment and geometry distortion of the standard National Institute of Standards and Technology (NIST) test artifact in Inconel 718 alloy, when several layers with and without supports are employed to manufacture it by the Selective Laser Melting (SLM) process. To this end, a coordinate-measuring machine (CMM) is used to measure the geometrical distortion in each manufacturing configuration, following the same measurement protocol. The results show that the laser path strategy favors a thermal gradient which, consequently, induces geometrical distortions in the part. To prove this hypothesis, a numerical simulation is performed to determine the thermal gradient and the pattern of the residual stresses. It was found that the geometrical distortion certainly depends on the position of the feature position and laser strategy, where thermal cycles and residual thermal stresses had an impact in the end-part geometry, especially if a high strength-to-weight ratio commonly used in aeronautics is present. Full article
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Planned Papers

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.

Title: Ultra-light replicable structures to achieve maximum functional characteristics
Authors: Javier Losada, Silvia Martinez, Haizea Gonzalez-Barrio, Norberto Lopez de Lacalle, Amaia Calleja-Ochoa and Aitzol Lamikiz
Affiliation: University of the Basque Country UPV/EHU and The Aeronautics Advanced Manufacturing Center CFAA; Spain

Title: Analysis of the Part Distortions for Inconel 718 SLM: A Case Study on the NIST Test Artifact
Authors: Silvia Martinez; Naiara Ortega; Diego Celentano; Antonio J. Sánchez Egea; Eneko Ukar; A. Lamikiz
Affiliation: Departamento de Ingeniería Mecánica, Universidad del País Vasco, Bilbao, Spain
Abstract: The present paper evaluates the misalignment and geometry distortion of the standard NIST test artifact in Inconel 718 alloy, when several layers with and without supports are employed to manufacture it by the Selective Laser Melting (SLM) process. To this end, a coordinate-measuring machine is used to measure the geometrical distortion in each manufacturing configuration, following the same measurement protocol. The results show that the laser path strategy favors a thermal gradient which, consequently, induce geometrical distortions in the part. In order to prove this hypothesis, a numerical simulation is performed to determine the thermal gradient and the pattern of the residual stresses. It was found that the geometrical distortion certainly depends on the position of the feature position and laser strategy, where thermal cycles and residual thermal stresses had an impact in the end-part geometry, especially if a high strength-to-weight ratio commonly used in aeronautics is present..

Title: Strive to reduce slurry erosion and cavitation in pumps through flow modifications, design optimization and some other techniques: Long term impact on process industry
Authors: Adnan Aslam Noon; Dr. Absaar Jabbar; , Hasan Koten; Man-Hoe Kim; Hafiz Waqar Ahmad; Umair Mueed; Ahmad Adnan Shoukat; Bilal Anwar
Affiliation: Department of Mechanical Engineering, Sungkyunkwan University, Republic of Korea
Abstract: Centrifugal pumps are being widely used for moving liquids that carry solids within different industries through pipelines where the need of head and flow rate is not high. Cavitation is an extremely complex and undesirable phenomenon which can be reduced to a certain extent and is not yet fully understood. Appropriate design and development of experiments is required to reasonably predict slurry erosion and cavitation. However, CFD methodology complements analytical solutions and experiments whenever testing of equipment has limitations. The current paper highlights the various slurry erosion and cavitation reduction techniques utilized by different researchers. Economic analysis conducted for a case study relevant to CP usage in Pakistan shows that 8% enhancement in pump efficiency can reduce the life cycle cost to about 17.6 % which could save up to USD 4,281 for a single pump annually in Pakistan.

Title: Fracture behavior of carbon reinforced composites applied to wind turbine blades
Authors: Ana Boyano1, Jose Manuel Lopez-Guede2, Leyre-Torre Tojal 3, Unai Fernandez-Gamiz 4, Ekaitz Zulueta 2, Faustino Mujika
Affiliation: 1 University of the Basque Country, UPV/EHU, Mechanical Engineering Dept, Faculty of Engineering of Vitoria-Gasteiz, Nieves Cano 12, 01006 Vitoria-Gasteiz, Spain. 2 University of the Basque Country, UPV/EHU, Systems Engineering and Automation Control Dept, Faculty of Engineering of Vitoria-Gasteiz, Nieves Cano 12, 01006 Vitoria-Gasteiz, Spain. 3 University of the Basque Country, UPV/EHU, Mining and Metallurgical Engineering and Materials Science Dept, Faculty of Engineering of Vitoria-Gasteiz, Nieves Cano 12, 01006 Vitoria-Gasteiz, Spain. 4 University of the Basque Country, UPV/EHU, Nuclear Engineering and Fluid Mechanics Dept, Faculty of Engineering of Vitoria-Gasteiz, Nieves Cano 12, 01006 Vitoria-Gasteiz, Spain 5 University of the Basque Country, UPV/EHU, Mechanical Engineering Dept, Faculty of Engineering Gipuzkoa, Plaza Europa 1, 20018 Donostia- San Sebastián, Spain
Abstract: Fiber-reinforced composites are widely used in wind turbine blades’ manufacturing. Although glass fiber reinforcement is the most used in wind turbine blades, the use of carbon fiber allows larger blades to be manufactured due to their better mechanical characteristics. Some turbine manufacturers are using carbon fiber in the most critical parts of the blade design. The larger rotors are exposed to complex loading conditions in service. At the structural scale, one of the most critical failures in a blade is delamination of unidirectional laminates in the spar cap. The determination of material parameters that govern delamination initiation and growth by appropriate testing is a fundamental topic for the study of composite delamination. The fracture behavior is studied across coupons of carbon fiber reinforcement epoxy laminates. Fifteen different test conditions have been studied. Fracture surfaces for different mode ratios have been explored using optical microscope and scanning electron microscope. Experimental results obtained for critical fracture parameters agree with the theoretical values. Therefore, the method can be used for wind turbine blade material characterization at the coupon testing level.

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