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Fabrication of Advanced Materials

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

Deadline for manuscript submissions: 20 May 2025 | Viewed by 571

Special Issue Editor


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Guest Editor
Department of Mechanical Engineering, Tsinghua University, Beijing, China
Interests: additive manufacturing; high-temperature alloys; intermetallic compounds; material characterization; microstructure; mechanical properties

Special Issue Information

Dear Colleagues,

The aerospace and biomedicine industries have rapidly developed, with progress in material advancements, and fabrication technologies have been shown to play a pivotal role. Additive manufacturing and welding processes for metallic materials have emerged as critical technologies, advancing high-tech industries. On the other hand, advanced fabrication technologies such as 3D bioprinting allow for the processing of biomaterials into tissue-mimetic functional constructs. Focusing on the fabrication of materials requires clear understanding and manipulation of material properties.

In order to enable researchers to understand microstructural evolution and performance data, one essential process in these fabrication techniques is material characterization. This knowledge is crucial for optimizing fabrication processes to achieve the desired properties.

Key challenges include understanding how fabrication techniques impact the microstructure and mechanical properties of materials, such as the grain size and defect formation for metallic materials which affect strength and toughness, or the microporous dimension and stiffness of hydrogel biomaterials. Optimizing the processing parameters would improve material performance. This will enhance material reliability in critical applications, benefiting industries like aerospace and biomedicine.

This Special Issue aims to study the fabrication technology of advanced materials. Topics of interest include, but are not limited to, advanced manufacturing technologies, 3D printing, welding, and other fabrication techniques.

Dr. Yang Li
Guest Editor

Manuscript Submission Information

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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

  • advanced manufacturing technologies
  • additive manufacturing
  • welding
  • other fabrication techniques
  • material characterization
  • microstructure
  • mechanical properties

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Published Papers (1 paper)

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Research

19 pages, 21170 KiB  
Article
Multiple Preheating Processes for Suppressing Liquefaction Cracks in IN738LC Superalloy Fabricated by Electron Beam Powder Bed Fusion (EB-PBF)
by Yang Li, Hongyu Long, Bo Wei, Jun Zhou and Feng Lin
Materials 2024, 17(22), 5667; https://doi.org/10.3390/ma17225667 - 20 Nov 2024
Viewed by 359
Abstract
In additive manufacturing, controlling hot cracking in non-weldable nickel-based superalloys poses a significant challenge for forming complex components. This study introduces a multiple preheating process for the forming surface in electron beam powder bed fusion (EB-PBF), employing a dual-band infrared surface temperature measurement [...] Read more.
In additive manufacturing, controlling hot cracking in non-weldable nickel-based superalloys poses a significant challenge for forming complex components. This study introduces a multiple preheating process for the forming surface in electron beam powder bed fusion (EB-PBF), employing a dual-band infrared surface temperature measurement technique instead of the conventional base plate thermocouple method. This new approach reduces the temperature drop during forming, decreasing surface cooling by 28.6% compared to traditional methods. Additionally, the precipitation of carbides and borides is reduced by 38.5% and 80.1%, respectively, lowering the sensitivity to liquefaction cracking. This technique enables crack-free forming at a lower powder bed preheating temperature (1000 °C), thereby improving the powder recycling rate by minimizing powder sintering. Microstructural analysis confirms that this method reduces low-melting eutectic formation and alleviates liquefaction cracking at high-angle grain boundaries caused by thermal cycling. Consequently, crack-free IN738 specimens with high-temperature durability were successfully achieved, providing a promising approach for the EB-PBF fabrication of crack-resistant IN738 components. Full article
(This article belongs to the Special Issue Fabrication of Advanced Materials)
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