Failures of Engineering Structures Caused by Weld Imperfections

Vladimír Mára; Jakub Horník; Elena Čižmárová; Jan Krčil; Pavlína Hájková

doi:10.4028/www.scientific.net/SSP.270.45

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Failures of Engineering Structures Caused by Weld Imperfections

Abstract:

The problematic of welding in terms of weld quality in dependence on service life of mechanical structures is discussed. Some examples of inadequate quality weld joints causing failure under load are described. Materials of the evaluated welds were following: S355 steel and Inconel 635 super alloy. Service conditions of homogeneous welds were different for both materials and weld quality was covered by Welding Procedure Specification. Using metallographic evaluation, the main problems were detected in a form of geometrical imperfections or insufficient penetration. These existing imperfections combined with static and dynamic load initiate the partial malfunction or failure of parts or constructions.

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Periodical:

Solid State Phenomena (Volume 270)

Pages:

45-51

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.270.45

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Online since:

November 2017

Authors:

Vladimír Mára*, Jakub Horník, Elena Čižmárová, Jan Krčil, Pavlína Hájková

Keywords:

Crack, Defects, Failure, Fracture, Weld Joint

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References

[1] M. Kutz, Mechanical Engineers' Handbook, 3rd ed. New Jersey: WILEY, 2005. 3600s. ISBN 978-0471449904.

Google Scholar

[2] H.K. Juna, J.W. Seoa, I.S. Jeonb, S.H. Leec, Y.S. Changc, Fracture and fatigue crack growth analyses on a weld-repaired railway rail, in: Engineering Failure Analysis. 59 (2016) 478–492.

DOI: 10.1016/j.engfailanal.2015.11.014

Google Scholar

[3] M.S. Khorrami, M.A. Mostafaei, H. Pouraliakbar, A.H. Kokabi, Study on microstructure and mechanical characteristics of low-carbon steel and ferritic stainless steel joints. in: Materials Science and Engineering: A, 608 (2014) 35-45.

DOI: 10.1016/j.msea.2014.04.065

Google Scholar

[4] ČSN EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials - Welding procedure specification - Part 1: Arc welding. ICS 25. 160. 10, Prague. ÚNMZ, July (2005).

DOI: 10.3403/03129507

Google Scholar

[5] W. Gao, K. Chen, X. Guo, L. Zhang, Fracture toughness of type 316LN stainless steel welded joints. in: Materials Science and Engineering: A, 685 (2017) 107-114.

DOI: 10.1016/j.msea.2016.12.128

Google Scholar

[7] ČSN EN ISO 6520-1, Welding and allied processes - Classification of geometric imperfections in metallic materials - Part 1: Fusion welding. ICS: 25. 160. 40, 3rd ed. Prague. ÚNMZ, January (2008).

DOI: 10.3403/01508933u

Google Scholar

[8] M.J. Ottersböck, M. Leitner, M. Stoschka, W. Maurer, Effect of weld defects on the fatigue strength of ultra high-strength steels. in: Procedia Engineering, 160 (2016) 214-222.

DOI: 10.1016/j.proeng.2016.08.883

Google Scholar

[9] ČSN EN ISO 5817, Welding – Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) – Quality levels for imperfections. ICS: 25. 160. 40, Prague, ÚNMZ, August, W014.

DOI: 10.3403/30408358

Google Scholar