Failure analysis of copper tube

A new interesting paper in « Engineering Failure Analysis » published on ScienceDirect.com. This paper reports the failure analysis of a leaked copper tube used in a refrigerating plant for carrying polyol ester oil for lubrication and cooling of compressor bearings. Failure had occurred at the bent region of the tube in the form of a wide diametric crack.

More information : Failure analysis of copper tube used in a refrigerating plant.

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Stress corrosion cracking in 316L stainless steel

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

There were three consecutive occurrences of bellows failure in a particular pressure safety valve (PSV) of a petroleum refinery within a time span of one week. The bellows were made of 316L grade austenitic stainless steel, and the PSV was mounted on one of the vessels of vacuum gas oil service in a hydrocracker unit. Metallurgical analysis of the failed bellows revealed that the failure had occurred by stress corrosion cracking (SCC)This paper brings out the detail of investigation carried out.

Validation of F-16 Wing Attachment Fitting bolts

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

During a modification programme, the Wing Attachment Fitting (WAF) cadmium-plated steel bolt assemblies from 33 F-16 aircraft were cleaned in a non-approved chemical solution, a paint stripper. This removed much of the cadmium plating, leading to in-service superficial rusting of some bolt ends and nuts. The OEM and chemical manufacturer became concerned about possible hydrogen embrittlement of the bolts owing to exposure to the paint stripper. This paper brings out the detail of investigation carried out.

Une défaillance en double teinte

Alertée par un de ses clients pour un problème de décollement de peinture sur des touches de commande de siège automobile, Grand Perret, une entreprise du groupe Faiveley , doit déterminer rapidement si ce décollement est dû à la peinture ou à l’injection plastique.

Spécialisée en conception et plasturgie, l’entreprise jurassienne ne dispose pas de l’équipement nécessaire pour effectuer cette analyse. Elle a ait appel au Cetim, la connaissance des peintures, de leurs applications, du traitement de surface, et ses moyens d’essais permettent au Cetim d’apporter des réponses précises et des actions correctives aux problématiques peintures

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