Application of Electron Beam Additive Manufacturing Process in Metal Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Additive Manufacturing".

Deadline for manuscript submissions: closed (20 October 2024) | Viewed by 1010

Special Issue Editors


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Guest Editor
Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
Interests: metal matrix composites; additive manufacturing techniques; combinatorial materials science

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Guest Editor Assistant
Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
Interests: physical metallurgy; mechanical behavior; microscopy

Special Issue Information

Dear Colleagues,

Electron beam additive manufacturing has reached a point in development where engineers and scientists can design materials and develop applications, beyond the classic determination of which alloys we can obtain with AM, or obtaining simple shapes like cubes. Examples of current trends for innovative applications include modifications of composition throughout a build (e.g., gradient materials, layered materials), intricate geometries (e.g., lattices, organic-inspired designs), creation of intermetallics and second phases (either desired or deleterious), creative ways to obtain alloys that were not printable in the past, and others. The realization of these advances depends upon a detailed understanding of the fundamentals of composition–process–microstructure–property relationships, and the fundamental work that underpins such an understanding.

This Special Issue is focused on publishing high-quality research of innovative applications of additive manufacturing of metal alloys using an electron beam as a heat source, covering aspects such as the process, geometries, compositions, microstructure, modeling, or testing of properties.

Prof. Dr. Peter Collins
Guest Editor

Dr. María José Quintana
Guest Editor Assistant

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Keywords

  • electron beam
  • additive manufacturing
  • application
  • metal alloys
  • microstructure
  • modeling

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Published Papers (1 paper)

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Research

18 pages, 8214 KiB  
Article
Electron Beam Additive Manufacturing of SS316L with a Stochastic Scan Strategy: Microstructure, Texture Evolution, and Mechanical Properties
by K. N. Chaithanya Kumar, Shashank Sharma, Madhavan Radhakrishnan, Rohit Randhavan, Krishna Kamlesh Verma, Shelden Dowden, Zane Weldon Hughes, Rajarshi Banerjee and Narendra B. Dahotre
Metals 2024, 14(11), 1278; https://doi.org/10.3390/met14111278 - 10 Nov 2024
Viewed by 670
Abstract
This study examines the microstructure, crystallographic texture evolution, and mechanical properties of stainless steel 316L fabricated through electron beam melting using a stochastic scan strategy at a preheat temperature of 1123 K. X-ray diffraction confirmed the presence of a pure austenitic phase in [...] Read more.
This study examines the microstructure, crystallographic texture evolution, and mechanical properties of stainless steel 316L fabricated through electron beam melting using a stochastic scan strategy at a preheat temperature of 1123 K. X-ray diffraction confirmed the presence of a pure austenitic phase in the fabricated material. Equiaxed cellular structures were observed in the center of the melt pool regions and elongated cellular structures observed at the melt pool overlap regions. A finite element-based numerical model was employed to estimate the thermal gradients and solidification rates within the melt pool of an electron beam spot. Microstructural analysis indicated a generation of columnar grains from the bottom to the top of the build owing to high thermal gradients. A crystallographic texture investigation showed a generation of strong <110> fiber texture along the build direction of the material and reported that the stress distributions within the melt pool led to a strong crystallographic texture driven by the stress evolution observed from thermokinetic computational modelling of the electron beam-melting process. Mechanical properties were assessed using profilometry-based indentation plastometry, demonstrating strain hardening at a high temperature of 773 K. Full article
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