Failure Analysis of Boat Rudder Fitting Fabricated from a Type 304 Stainless Steel

Rezwanul Haque; Helen Fairweather; Ayodele Olofinjana

doi:10.1007/s11668-018-0430-8

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Failure Analysis of Boat Rudder Fitting Fabricated from a Type 304 Stainless Steel

Journal article

Peer reviewed

Failure Analysis of Boat Rudder Fitting Fabricated from a Type 304 Stainless Steel

Rezwanul Haque, Helen Fairweather and Ayodele Olofinjana

Journal of Failure Analysis and Prevention, Vol.18(3), pp.519-525

2018

DOI: https://doi.org/10.1007/s11668-018-0430-8

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Abstract

branched cracking

oxide-filled cracking

stress corrosion cracking

crack tip

The failure of a type 304 stainless steel component subassembled by welding and used on a boat in a marine environment was investigated. The mechanism of damage initiation and the cause of final failure were investigated. Initial examination of the component indicated deep branching cracks that were thought to have developed during service. The combination of microhardness test and finite element modeling (FEM) was employed to probe micromechanical properties of the damaged area. The corrosion observed was followed with scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). FEM analysis suggests that the cracked area had been subjected to tensile stresses in service. Microhardness across the welded section did not show any mechanical degradation across the weld and heat-affected zone. The cracked area was evidently corroded, and the microanalysis in the SEM/EDS indicated the presence of corrosion products. Regions around the cracks especially at the root of the crack were found to be severely depleted of Ni. It is evident that the primary course of failure was from the cracking from SCC attack and that the pitting observed is a secondary effect in the cracked region. © 2018 ASM International

Details

Title: Failure Analysis of Boat Rudder Fitting Fabricated from a Type 304 Stainless Steel
Authors: Rezwanul Haque (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Helen Fairweather (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Ayodele Olofinjana (Corresponding Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Publication details: Journal of Failure Analysis and Prevention, Vol.18(3), pp.519-525
Publisher: Springer New York LLC
Date published: 2018
DOI: 10.1007/s11668-018-0430-8
ISSN: 1547-7029
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering; Sustainability Research Cluster
Language: English
Record Identifier: 99450710802621
Output Type: Journal article

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