Archives du mot-clef Failure analysis

SCC investigation of low alloy ultra-high strength steel

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An interesting paper in « Chinese Journal of Aeronautics«  published on ScienceDirect.com.

The paper reports detail of investigation carried out. SCC behavior of low alloy ultra-high strength steel 30CrMnSiNi2A in neutral 3.5 wt%NaCl solution is investigated by SSRT with different strain rates under OCP, cathodic, and anodic polarization potentials, electrochemical measurements and surface analysis technique. The effect of strain rate on SCC behavior is analyzed and SCC mechanisms at OCP, cathodic and anodic polarization potentials are discussed in detail.

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Failure study of a railway rail

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A interesting paper in « Case study in Engineering Failure Analysis » published on ScienceDirect.com.

In this case study, a failed railway rail which was used for heavy cargo trains was investigated in order to find out its root cause.

This paper brings out the detail of investigation carried out. 

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Corrosion in a carbon steel refinery hydrocarbon line

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A interesting paper in « Case study in Engineering Failure Analysis » published on ScienceDirect.com.

An explosion and fire occurred at a refinery site leading to the evacuation of the site and to millions of pounds worth of damage to the facility. A laboratory investigation was carried out to establish the immediate cause and any underlying factors that may have contributed to the incident. This paper brings out the detail of investigation carried out.

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FAILURE ANALYSIS – CASE STUDIES II

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Capture Case studies IIEn ligne, un ouvrage de 460 pages regroupant des études de cas concrets  de défaillances  sélectionnés à partir des pages de  « Engineering Failure Analysis » 1997- 1999, édité by D.R.H. JONES, Department of Engineering – University of Cambridge, UK.

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Failure Analysis – Industrial Case Studies

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This web site deals with industrially-derived case studies in forensic engineering and failure analysis, which are firmly grounded in the context of their legal, insurance and design consequences. The development of this interactive learning package follows on from existing web-based projects in learning support via on-line tutorials, focussed internet resources and detailed analysis and discussion of case studies in failure.

More at : Failure Analysis – Industrial Case Studies.

Failure analysis of a bridge crane shaft

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Failure analysis of a shaft used in a bridge crane has been carried out. The shaft was fractured in the keyway with evidence of fatigue.

This paper published in  » Engineering Failure Analysis » was finded on ScienceDirect.com.

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Failure of rubber O-ring

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A new interesting paper in  » Engineering Failure Analysis » published on ScienceDirect.com.

This paper presents the effects of hydrogen pressure, ambient temperature and pressure cycle pattern on fracture behavior of O-rings moulded from a peroxide-crosslinked EPDM rubber with white reinforcing filler under cyclic exposure to high-pressure hydrogen gas.

Read more at : Failure behavior of rubber O-ring under cyclic exposure to high-pressure hydrogen gas

 

Failure of a Motor Vessel’s Crankshaft 1968

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An interesting paper published in  « Engineering Failure Analysis » :

In July 1968 the Swedish motor vessel “MV Stureholm” traveled from Sweden across the North Atlantic with destination to the American gulf harbours.  About 100 nautical miles north of the peninsula Yucatan the 9,000 HP diesel engine failed as a consequence of fatigue failure of the crankshaft. The ship was disabled and had to be towed to Veracruz, Mexico. The Swedish shipowning company decided to perform a temporary repair in Veracruz by welding the fatigue crack. Back in Sweden the damaged but repaired crankshaft was dismounted from the engine and inspected by surveyors. The result was that a fatigue crack had initiated from a subsurface solidification (hot) crack.

This paper brings out the detail of investigation carried out. Read more at : Failure of a Motor Vessel’s Crankshaft 1968.

Premature cracking of dies for aluminum alloy die casting

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Die casting AluminiumAn interesting paper of Bogdan Pawlowski, AGH University of Science and Technologie in Krakow, published in « Archives of Metallurgy and Materials » :

Two identical dies for aluminum alloy die-casting failed prematurely because of a number of parallel cracks on the working surface. These cracks were of a mechanical nature related to incorrect microstructural banding orientation of the die core and related to improper heat treatment. The root cause of premature cracking of dies was improper heat treatment (temper embrittlement).

More at :  http://imim.pl/files/archiwum/Vol4_2013/40.pdf

Damage mechanism and prevention of heavy-haul railway rail

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A new interesting paper in  » Engineering Failure Analysis »  of december 2013 published on ScienceDirect.com.

The objective of this paper was to investigate wear and damage behavior of heavy-haul railway rail.

More at : Investigation on the damage mech………