3D Characterization of Structure and Micro-Porosity in Two Cast Irons with Spheroidal Graphite

Abstract

Formation of low density graphite phase during solidification increases the volume of semi-solid cast iron with spheroidal graphite (SGI) and resulted pressure could help eliminate shrinkage micro-porosity in casting. Therefore, micro-porosity in casting can be linked to 3D graphite nodule structure. Two experimental SGI's with different levels of shrinkage micro-porosity in castings were intentionally produced by variation in inoculation parameters which influenced graphite nodule structure. 3D-morphological characteristics of graphite nodules and micro-porosity level were determined by µCT scanning. The obtained statistical data was discussed with respect to graphite nodule solidification mode and casting soundness. The capabilities of µCT scanning in predicting micro-shrinkage in SGI casting were compared to the other traditionally used techniques.

Department(s)

Materials Science and Engineering

Second Department

Nuclear Engineering and Radiation Science

Research Center/Lab(s)

Center for Research in Energy and Environment (CREE)

Comments

Authors greatly appreciated American Foundry Society for funding this research.

Keywords and Phrases

3D Scanning; Cast Iron; Micro-Porosity; Solidification; Spheroidal Graphite; Structure

International Standard Serial Number (ISSN)

1044-5803

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2019 Elsevier Inc., All rights reserved.

Publication Date

01 Dec 2019

Link to Full Text

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