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On Porosity and Its Mitigation and Closure in Additively Manufactured Alloys

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Proceedings of the 3rd International Conference on Advanced Surface Enhancement (INCASE) 2023 (INCASE 2023)

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

Porosity has long been observed in manufacturing metal alloys, which is much more frequent in additively manufactured (AM) alloys than in those manufactured by traditional methods such as cast and wrought. The common origin of porosity is strongly depending on specific manufacturing process parameters and conditions. In general, pore structures can originate from a variety of factors, including trapped gas, incomplete fusion, cooling rate, feedstock quality, processing parameters and conditions, etc. By carefully controlling the manufacturing process and conditions, the porosity in AM-alloys can be mitigated. Besides, post-AM treatment, e.g., hot isostatic pressing and/or cold working, can reduce the porosity (in both the size and density) through plastic deformation and materials flow. Here, we present a glimpse on porosity and its effect on mechanical performance of AM alloys. Mitigation and closure of porous structures will also be discussed mainly based on recent observations in aluminum- and nickel-based AM alloys, representing high-temperature high-strength and low-density applications, respectively.

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Authors and Affiliations

  1. Institute of Materials Research and Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Singapore, 138634, Singapore

    Tzee Luai Meng, Na Gong, Rahul Karyappa & Hongfei Liu

  2. Advanced Remanufacturing and Technology Center (ARTC), A*STAR (Agency for Science, Technology and Research), 3 CleanTech Loop, Singapore, 637143, Singapore

    Wai Luen Chan, Yuefan Wei & Henry Kuo Feng Cheng

Authors
  1. Tzee Luai Meng
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  2. Na Gong
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  3. Wai Luen Chan
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  4. Rahul Karyappa
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  5. Yuefan Wei
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  6. Henry Kuo Feng Cheng
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  7. Hongfei Liu
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Corresponding author

Correspondence to Hongfei Liu .

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Editors and Affiliations

  1. Advanced Remanufacturing and Technology Centre (ARTC), Singapore, Singapore

    Niroj Maharjan

  2. Singapore Institute of Manufacturing Technology (SIMTech), Singapore, Singapur, Singapore

    Wei He

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© 2024 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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Meng, T.L. et al. (2024). On Porosity and Its Mitigation and Closure in Additively Manufactured Alloys. In: Maharjan, N., He, W. (eds) Proceedings of the 3rd International Conference on Advanced Surface Enhancement (INCASE) 2023. INCASE 2023. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-99-8643-9_25

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  • DOI: https://doi.org/10.1007/978-981-99-8643-9_25

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-99-8642-2

  • Online ISBN: 978-981-99-8643-9

  • eBook Packages: EngineeringEngineering (R0)

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