Novel Approaches to Analyze Structure of Ductile Iron

Abstract

The suggested approaches. including an automated SEMI EDX (Scanning Electron Microscopy/Energy Dispersive X-ray) analysis of graphite nodule nuclei and a special algorithm to convert two-dimensional to three-dimensional graphite nodule size distribution, were tested. The "soft" quenching technique was applied to develop small graphite nodules and increase probability to reveal non-metallic heterogeneous nuclei using automated SEM/EDX analysis. Ternary diagrams present experimental statistics of the graphite nuclei chemistiy. A special algorithm for the conversion of diameters of two-dimensional sections of graphite nodules to the real three-dimensional distribution of spherical particles was developed. This algorithm is based on inverse ciniulatinn The developed program calculates a three-dimensional nodule diameter distribution curve, the real average diameter, and volumetric nodule number. The examples of practical applications of these methods for spherical graphite characterization in different ductile iron castings are provided. Heterogeneous nucleation of graphite nodules is discussed based on the novel experimental data. Copyright © 2014 American Foundry Society.

Department(s)

Materials Science and Engineering

Keywords and Phrases

3-D quantitative technique; Ductile iron; Graphite; Heterogeneous nucleation

International Standard Serial Number (ISSN)

1939-5981

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Springer, All rights reserved.

Publication Date

01 Jan 2014

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