Special Issue "Additive Manufacturing of High Temperature Alloys"
Deadline for manuscript submissions: 20 March 2024 | Viewed by 9000
Interests: additive manufacturing; smart materials; mechanical behavior; damage and fracture of engineering materials
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High-temperature alloys, such as superalloys, are some of the most commonly employed alloys for metal additive manufacturing and have a wide range of applications in aircraft, gas turbines, turbocharger rotors, and a variety of other energy and aerospace applications.
Additive manufacturing (AM) is considered an attractive manufacturing technique for components with complex geometries due to the near-net shape production capability. Despite the many advantages of AM methods, including design flexibility, producing functionally graded parts, and a significantly lower buy-to-fly ratio, aspects such as the development of high residual stresses and, possibly, the formation of detrimental phases and defects in additively manufactured parts are a matter of concern. Thus, one of the main challenges preventing the widespread use of the AM method for the production of critical parts is the uncertainty in the resultant properties, such as quality, reproducibility, and predictability of mechanical and functional performance. AM process condition optimization and post-processing heat treatments are then often employed to reduce these detrimental effects and enhance the properties.
It is our pleasure to invite you to submit contributions that may take into account any of high-temperature alloy aspects involved in additive manufacturing. For this open-access Special Issue, we particularly welcome original research articles and review papers focused on (i) the relationship between AM process parameters, evolution of resulting microstructure, and functional properties; (ii) the effect of various heat treatments; (iii) mechanical performance and environmental effects (high temperature, hydrogen or corrosive environment); (iv) the development of functionally graded or multimaterials AM; (v) modeling and design for performance optimization; and (vi) powder and alloy design.
Dr. Vera Popovich
Dr. Ehsan Hosseini
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. Metals 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.
- high-temperature alloys
- additive manufacturing (AM)
- laser powder bed fusion (L-PBF)
- electron beam powder bed fusion (EB-LBF), direct metal deposition (DMD), alloy and product design
- post-process treatment
- microstructural characterization
- mechanical and functional properties
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: Hydrogen embrittlement resistance of additively manufactured 316L stainless steel from recycled sources
Authors: M. Vanazzi1; L.E. Mondora1,2; G. Acquistapace2; N. Mohandas3; M. Scurria4; M. Giovanardi4; Y. Wilkens5; T. Brune5; V. Popovich3
Affiliation: 1. f3nice Srl, Via G. Uberti 12, 20129 Milano (MI), Italy. 2. Valland SpA, Via Roccoli 252, 23010 Piantedo (SO), Italy. 3. Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands. 4. TEC Eurolab Srl, Viale Europa 40, 41011 Campogalliano (MO), Italy. 5. SMS group GmbH, Ohlerkirchweg 66, 41069 Moenchengladbach, Germany
Abstract: To establish a more sustainable approach towards the production and storage of energy, hydrogen has been proposed as the ultimate candidate. Indeed, thanks to several remarkable properties (i.e., high availability, good energy density, greenness in the production and usage) hydrogen stands as an efficient energy source as well as an energy vector. Due to the very demanding operative conditions, however, new material solutions are required to reach a significant deployment of hydrogen-based technologies. In this framework, Additive Manufacturing (AM) or 3D printing has been considered. AM technologies allow the manufacturing of innovative materials with unusual properties, because of the peculiar process-induced microstructure. In the case of metallic materials, superior mechanical properties can be sometimes achieved. In this work, the 316L stainless steel produced by Laser-based Powder Bed Fusion (LB-PBF) has been characterized for hydrogen-related applications. Specimens have been manufactured from 100% recycled material, according to a proprietary process by f3nice. As-printed samples have been pre-charged with gaseous hydrogen at 100 bar pressure and 300 °C, from 5 to 18 days, and subsequently analyzed to check the hydrogen content inside the material. Afterwards, tensile and high-cycles fatigue tests have been performed to investigate the hydrogen-induced degradation mechanisms of the pre-charged material. The resulting properties have been compared to the asprinted counterpart, showing the high-level of compatibility of LB-PBF 316L stainless steel in hydrogen gas. Concerning the tensile tests, no embrittlement was observed. The yield strength does not change after the hydrogen exposure (from 464 ± 3 MPa to 472 ± 5 MPa), while the elongation to rupture remains in the acceptance range (i.e., well above 30%). The fatigue tests present similar outcome. The number of cycles to failure moves from 389.000 ± 107.000 to 477.000 ± 127.000. To conclude, in the present study a highly sustainable hydrogen-resistant 316L stainless steel was printed. The 100% recycled metal has been successfully characterized for hydrogen-related applications, showing good resistance towards hydrogen embrittlement phenomena. These promising results represent a major step forward towards the adoption of metal additive manufacturing from recycled material in relevant industry fields.