Effect of retained porosity due to additive manufacturing on dynamic loadings
Benoit Revil-Baudard, Oana Cazacu, Sujeily Soto-Medina, Philip Flater
Abstract. The major advantage of additive manufacturing (AM) of metallic materials is the capacity to produce parts with complex geometry that are difficult to achieve with conventional processes. However, for applications subjected to high-strain rate loadings, improving the understanding of the dynamic behavior of AM high strenght steel is essential to enlarge the range of application for such AM metals. Experiments have shown that even if for quasi-static and moderate strain-rates (of the order of 102-103/s), the mechanical response of additively manufactured (AM) and traditionally processed materials is similar, the impact behavior is markedly different. In this paper, we reveal that the main reason for this difference is the retained porosity in the AM material. To gain understanding, a numerical study using an elastic/plastic damage model that accounts for the effects of the tension-compression asymmetry in plastic deformation and its influence on porosity evolution is performed for material with different level of retained porosity. The finite-element results reveal that even a very small amount of initial porosity leads to an increase in the shock rise time, explaining the observed trends.
Keywords
Additive Manufacturing, Plate Impact, Finite-Element, Porosity
Published online 5/7/2025, 7 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Benoit Revil-Baudard, Oana Cazacu, Sujeily Soto-Medina, Philip Flater, Effect of retained porosity due to additive manufacturing on dynamic loadings, Materials Research Proceedings, Vol. 54, pp 330-336, 2025
DOI: https://doi.org/10.21741/9781644903599-36
The article was published as article 36 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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