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Macro Porosity Formation: A Study in High Pressure Die Casting

International Journal of Metalcasting volume 16, pages 330–341 (2022)Cite this article

Abstract

Porosity formation in high pressure die casting (HPDC) impacts mechanical properties and casting quality. Much is published regarding micro porosity and its impact on mechanical properties, but there is limited research on the actual formation of macro porosity. In production applications, macro porosity plays a critically important role in casting quality and acceptance by the customer. This paper argues that the most useful definition of macro porosity is the limits of visual detectability. With this definition, it will be shown macro porosity presents stochastically within a controlled HPDC process. This means macro porosity has a random probability distribution or pattern that should be analyzed statistically and cannot be predicted precisely. The general region where macro porosity forms is predictable with simulation, but its actual size and distribution of the voids are random. These results challenge the industry accepted practices for inspections and process controls. This also underscores the importance of up-front design for manufacturability to avoid macro porosity-related quality issues.

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Funding

Research was sponsored by Mercury Marine – Mercury Castings, a division of Brunswick, Inc.

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Authors and Affiliations

  1. Mercury Marine – Mercury Castings, A Division of Brunswick, Inc., Fond du Lac, WI, USA

    David Blondheim Jr. & Alex Monroe

  2. Colorado State University, Fort Collins, CO, USA

    David Blondheim Jr.

  3. Michigan Technological University, Houghton, MI, USA

    Alex Monroe

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  1. David Blondheim Jr.
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Correspondence to David Blondheim Jr..

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Blondheim, D., Monroe, A. Macro Porosity Formation: A Study in High Pressure Die Casting. Inter Metalcast 16, 330–341 (2022). https://doi.org/10.1007/s40962-021-00602-x

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