Analysis of Causes of Fractures of Terminal Board Bolts

Jiří Švejcar; Lenka Klakurková; Martin Juliš; Pavel Gejdoš; Michaela Remešová; Lucie Páleníková

doi:10.4028/www.scientific.net/SSP.270.93

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Analysis of Causes of Fractures of Terminal Board Bolts

Abstract:

The paper sums up the results of a complex analysis, using metallographic, microfractograpic and other methods, with the aim of establishing the cause of fractures appearing in bolts of a terminal board. The analysis has shown unambiguously that the bolt failure was a synergic effect of inadequately performed heat treatment and hydrogenation that occurred in course of surface treatment via pickling and subsequent zinc plating.

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Periodical:

Solid State Phenomena (Volume 270)

Pages:

93-98

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.270.93

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Online since:

November 2017

Authors:

Jiří Švejcar*, Lenka Klakurková, Martin Juliš, Pavel Gejdoš, Michaela Remešová, Lucie Páleníková

Keywords:

Bolts, Delayed Fractures, Surface Defects

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References

[1] EN ISO 898-1 Mechanical properties of fasteners made of carbon steel and alloy steel – Part 1: Bolts, screws and studs with specified property classes – Coarse tread and fine pitch thread. Belgium: CEN, (2009).

DOI: 10.3403/30151816

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[2] Hyspecká, L. Mazanec, K. Vodíková křehkost konstrukčních ocelí o vyšších parametrech. Praha: Academia, 1978, 154 s.

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