Scanning Electron Microscopy as a Tool for Castings Quality Analysis
Nowadays, the best castings’ manufacturers have to meet very demanding requirements and specifications applicable to mechanical properties and other characteristics. To fulfill those requirements, more and more sophisticated methods are being used to analyze the internal quality of castings. In many...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Polish Academy of Sciences
2022-03-01
|
| Series: | Archives of Foundry Engineering |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/122602/PDF/AFE%201_2022_08%20Issue%201_2022.pdf |
| _version_ | 1827926022995050496 |
|---|---|
| author | J. Jezierski M. Dojka M. Stawarz R. Dojka |
| author_facet | J. Jezierski M. Dojka M. Stawarz R. Dojka |
| author_sort | J. Jezierski |
| collection | DOAJ |
| description | Nowadays, the best castings’ manufacturers have to meet very demanding requirements and specifications applicable to mechanical properties and other characteristics. To fulfill those requirements, more and more sophisticated methods are being used to analyze the internal quality of castings. In many cases, the commonly used Non-Destructive Methods, like X-ray or ultrasonic testing, are not enough to ensure precise and unequivocal evaluation. Especially, when the properties of the casting only slightly fail the specification and the reasons for such failures are very subtle, thus difficult to find without the modern techniques. The paper presents some aspects of such an approach with the use of Scanning Electron Microscopy (SEM) to analyze internal defects that can critically decrease the performance of castings. The paper presents the so-called bifilm defects in ductile and chromium cast iron, near-surface corrosion caused by sulfur, micro-shrinkage located under the risers, lustrous carbon precipitates, and other microstructure features. The method used to find them, the results of their analysis, and the possible causes of the defects are presented. The conclusions prove the SEM is now a powerful tool not only for scientists but it is more and more often present in the R&D departments of the foundries. |
| first_indexed | 2024-03-13T05:32:29Z |
| format | Article |
| id | doaj.art-56f4bd23a22f4ddab1a1b643d19b2e23 |
| institution | Directory Open Access Journal |
| issn | 2299-2944 |
| language | English |
| last_indexed | 2024-03-13T05:32:29Z |
| publishDate | 2022-03-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Foundry Engineering |
| spelling | doaj.art-56f4bd23a22f4ddab1a1b643d19b2e232023-06-14T15:21:39ZengPolish Academy of SciencesArchives of Foundry Engineering2299-29442022-03-01vol. 22No 15361https://doi.org/10.24425/afe.2022.140217Scanning Electron Microscopy as a Tool for Castings Quality AnalysisJ. Jezierski0https://orcid.org/0000-0003-2078-196XM. Dojka1M. Stawarz2https://orcid.org/0000-0001-7729-6768R. Dojka3Department of Foundry Engineering, Silesian University of Technology, 7 Towarowa, 44-100 Gliwice, PolandDepartment of Foundry Engineering, Silesian University of Technology, 7 Towarowa, 44-100 Gliwice, PolandDepartment of Foundry Engineering, Silesian University of Technology, 7 Towarowa, 44-100 Gliwice, PolandODLEWNIA RAFAMET Sp. z o.o., 1 Staszica, 47-420 Kuźnia Raciborska, PolandNowadays, the best castings’ manufacturers have to meet very demanding requirements and specifications applicable to mechanical properties and other characteristics. To fulfill those requirements, more and more sophisticated methods are being used to analyze the internal quality of castings. In many cases, the commonly used Non-Destructive Methods, like X-ray or ultrasonic testing, are not enough to ensure precise and unequivocal evaluation. Especially, when the properties of the casting only slightly fail the specification and the reasons for such failures are very subtle, thus difficult to find without the modern techniques. The paper presents some aspects of such an approach with the use of Scanning Electron Microscopy (SEM) to analyze internal defects that can critically decrease the performance of castings. The paper presents the so-called bifilm defects in ductile and chromium cast iron, near-surface corrosion caused by sulfur, micro-shrinkage located under the risers, lustrous carbon precipitates, and other microstructure features. The method used to find them, the results of their analysis, and the possible causes of the defects are presented. The conclusions prove the SEM is now a powerful tool not only for scientists but it is more and more often present in the R&D departments of the foundries.https://journals.pan.pl/Content/122602/PDF/AFE%201_2022_08%20Issue%201_2022.pdfcastings defectscastings qualityinternal defectsbifilmscanning electron microscopy |
| spellingShingle | J. Jezierski M. Dojka M. Stawarz R. Dojka Scanning Electron Microscopy as a Tool for Castings Quality Analysis Archives of Foundry Engineering castings defects castings quality internal defects bifilm scanning electron microscopy |
| title | Scanning Electron Microscopy as a Tool for Castings Quality Analysis |
| title_full | Scanning Electron Microscopy as a Tool for Castings Quality Analysis |
| title_fullStr | Scanning Electron Microscopy as a Tool for Castings Quality Analysis |
| title_full_unstemmed | Scanning Electron Microscopy as a Tool for Castings Quality Analysis |
| title_short | Scanning Electron Microscopy as a Tool for Castings Quality Analysis |
| title_sort | scanning electron microscopy as a tool for castings quality analysis |
| topic | castings defects castings quality internal defects bifilm scanning electron microscopy |
| url | https://journals.pan.pl/Content/122602/PDF/AFE%201_2022_08%20Issue%201_2022.pdf |
| work_keys_str_mv | AT jjezierski scanningelectronmicroscopyasatoolforcastingsqualityanalysis AT mdojka scanningelectronmicroscopyasatoolforcastingsqualityanalysis AT mstawarz scanningelectronmicroscopyasatoolforcastingsqualityanalysis AT rdojka scanningelectronmicroscopyasatoolforcastingsqualityanalysis |