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Metals
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Advances in Modeling and Analysis of Additive Manufactured Materials
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Advances in Modeling and Analysis of Additive Manufactured Materials

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Computation and Simulation on Metals".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 6129

Special Issue Editor

Prof. Dr. Hirpa G. Lemu

E-Mail Website
Guest Editor
Faculty of Science and Technology, University of Stavanger, N-4036 Stavanger, Norway
Interests: additive manufacturing; computational methods in engineering; design optimization; finite element analysis; simulation-driven optimization; performance of energy converters; renewable energy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Parallel with the technological advances in additive manufacturing, the interest to be able to predict the mechanical properties of additive manufactured components progressing. As several process variables influence the additive fabrication process, establishing a straightforward method to characterize the material properties has not been easy. Recent focus has been on using experimental methods, which is expensive. Analytical approaches to describe the mechanical responses as a function of the performance parameters a mechanical or structural system is also limited due to the diversity of the manufacturing variables. As a result, modelling and analysis methods such as application of finite element methods seem to be viable though the approaches are still under progressive development. This special issue intends to serve as a platform where recent research advances on modelling and analysis of additive manufactured materials, including polymers, composites and metallic materials, are disseminated and shared. The special issue will accommodate both original research articles and critical reviews.

Prof. Dr. Hirpa G. Lemu
Guest Editor

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.

Keywords

  • 3D printing
  • additive manufacturing
  • additive material behavior
  • finite element analysis
  • layer manufacturing

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Published Papers (2 papers)

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Research

17 pages, 3689 KiB  
Article
Predicting the Strength of EBAM 3D Printed Ti-6Al-4V from Processing Conditions
by Tanya Johnson, Abbey Peters, D. Gary Harlow and Christina Viau Haden
Metals 2022, 12(3), 431; https://doi.org/10.3390/met12030431 - 1 Mar 2022
Viewed by 2247
Abstract
In this study, a process-to-property linear regression model was developed to predict the yield and ultimate tensile strengths of as printed Ti-6Al-4V from electron beam additive manufacturing (EBAM). A total of 8 printing conditions such as bead width, wire feed rate, deposition speed [...] Read more.
In this study, a process-to-property linear regression model was developed to predict the yield and ultimate tensile strengths of as printed Ti-6Al-4V from electron beam additive manufacturing (EBAM). A total of 8 printing conditions such as bead width, wire feed rate, deposition speed were utilized to predict the material properties in three different notional parts produced over a period of several months. It was found that as the precision and variety of processing conditions collected during print improved between prints, so did the predictive ability of the model. In the final print, the model predicted the yield and ultimate strengths of 72 specimens with an R2 correlation of 0.8 and 0.6 for the horizontal and vertical test specimens, respectively. Although the current model indirectly accounted for thermal fluctuations, further improvements to the model’s ability to predict material strength are expected with the addition of thermal data captured in subsequent notional parts. Full article
(This article belongs to the Special Issue Advances in Modeling and Analysis of Additive Manufactured Materials)
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18 pages, 6023 KiB  
Article
A Thermo-Mechanical Analysis of Laser Hot Wire Additive Manufacturing of NAB
by Glenn W. Hatala, Qian Wang, Edward W. Reutzel, Charles R. Fisher and Jennifer K. Semple
Metals 2021, 11(7), 1023; https://doi.org/10.3390/met11071023 - 25 Jun 2021
Cited by 9 | Viewed by 3132
Abstract
There is increased interest in using nickel aluminum bronze (NAB) alloys in large-scale directed energy deposition additive manufacturing (DEDAM) processes for maritime applications, but one challenge lies in the component distortion that results from residual stress generated during fabrication. This paper describes the [...] Read more.
There is increased interest in using nickel aluminum bronze (NAB) alloys in large-scale directed energy deposition additive manufacturing (DEDAM) processes for maritime applications, but one challenge lies in the component distortion that results from residual stress generated during fabrication. This paper describes the development and evaluation of thermo-mechanical simulations for laser hot wire (LHW) DEDAM of NAB to predict part distortion. To account for the dearth of temperature-dependent properties for NAB C95800 in open literature and public databases, temperature-dependent material and mechanical properties for NAB C95800 were experimentally measured using test specimens fabricated with a variety of DEDAM processes. Autodesk’s Netfabb Local Simulation software, a commercial finite-element based AM solver, was employed but with its heat source model modified to accommodate LHW DEDAM’s oscillating laser path and additional energy input supplied by the preheated wire feedstock. Thermo-mechanical simulations were conducted using both the acquired temperature-dependent material and mechanical properties and the constant room-temperature properties to assess the impact on simulation accuracy. The usage of constant properties in the thermo-mechanical analysis resulted in significantly different predicted distortion compared to those using the temperature-dependent properties, at times even predicting substrate displacement in an opposite direction. Full article
(This article belongs to the Special Issue Advances in Modeling and Analysis of Additive Manufactured Materials)
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