Failure Analysis of Shipping Container Handler Twistlock Pin

During operation of a shipping container handler, a twistlock pin supporting one side of two stacked shipping containers fractured, causing the shipping containers to fall. An investigation revealed that the alloy steel pin had a ferritic/bainitic microstructure with an average hardness of 29.5 HRC...

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Veröffentlicht in:Journal of failure analysis and prevention 2020-06, Vol.20 (3), p.641-646
Hauptverfasser: Kral, M. V., Beardsley, A. L., Breeuwer, N. J.
Format: Artikel
Sprache:eng
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Zusammenfassung:During operation of a shipping container handler, a twistlock pin supporting one side of two stacked shipping containers fractured, causing the shipping containers to fall. An investigation revealed that the alloy steel pin had a ferritic/bainitic microstructure with an average hardness of 29.5 HRC and a typical Charpy V-notch impact energy of 17 J at room temperature. Examination of the fracture surface revealed a cleavage fracture that initiated from a quench crack. It was determined that the primary cause of the failure was improper heat treatment.
ISSN:1547-7029
1728-5674
1864-1245
DOI:10.1007/s11668-020-00871-4