Concilier soudage et peinture, le 1er juin à Cherboug

Rendez-Vous de la MecaniqueQue mettre en œuvre pour fiabiliser la tenue de vos peintures ?

  • Améliorer la préparation de vos pièces,
  • Améliorer la qualité du soudage
  • Peinture : état des lieux

… pour des pièces fiables et esthétiques.

En savoir plus et s’inscrire

Abrasive Wear Failure Analysis of Tungsten Carbide Hard facing on Carbon Steel Blade

This content has been downloaded from IOPscience, Series: Materials Science and Engineering 165 (2017),

This study investigate the abrasive wear failure of tungsten carbide hardfacing on continuous digester (CD) blade (carbon steel) in an environment of sulphuric acid and ilmenite ore mixture. Comparison being made on the hardness, thickness and microstructural of the hardfacing between unworn and 3 months old worn blade on few locations around the blade. The cross sections of the blade revealed non-uniform coverage of the hardfacing on the blade for both worn and unworn blade. The edge of the blade has the least amount of hardfacing thickness which with time acts as the point of failure during the wear process. The hardness obtained from both the unworn and worn samples are around 25% lower from the hardfacing electrode manufacturer’s hardness specification. Microstructural micrograph analysis of the hardfacing reveale

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Concerns of corrosive effects with respect to lightning protection systems

An interesting  paper published in  » Engineering Failure Analysis » on www.sciencedirect.com, Volume 57, November 2015.

Lightning protection system elements need to be selected from materials which are resistant to corrosion and should be protected from fast degradation. However, over the time corrosion will take place in the presence of galvanically dissimilar metals in the same electrolyte (moisture)……

This paper presents the causes of corrosion and recent developments in minimising the corrosion associated with lightning protection and grounding systems.

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Fatigue Failure Analysis of a Cooling Fan Blade

A paper published in  » Engineering Failure Analysis » on www.sciencedirect.com.

Fatigue failure of holding U-bolt of a cooling fan blade is analyzed. Fractography of the fracture surface reveals the characteristics of a fatigue fracture. Finite element modeling is used for stress analyzing. Analysis of the loading conditions indicates that the bolts are under multiaxial fatigue. ……..

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Formation – Pratique de l’analyse de défaillances – Mulhouse du 24 au 28 avril

Améliorez la qualité et la conception de vos produits grâce à l’analyse de défaillances.

  • décrire les différentes étapes de la démarche d’une analyse de défaillances ;
  • identifier les différents types de rupture et les modes de sollicitation liés ;
  • sélectionner les examens complémentaires à l’analyse morphologique les plus pertinents ;
  • nommer les grandes familles de défaillances en corrosion ;
  • nommer les grandes familles de défaillances en usure.

Quatre sessions en 2017 :

  • Mulhouse du 24/04/2017 au 28/04/2017
  • Senlis du 29/05/2017 au 02/06/2017
  • Nantes du 04/09/2017 au 08/09/2017
  • Saint-Etienne du 16/10/2017 au 20/10/2017

Plus d’informations et inscription

Failure analysis of a bridge crane shaft

A paper published in « Case Studies in Engineering Failure Analysis » on april 2014.

Failure analysis of a shaft used in a bridge crane has been carried out. The shaft fractured in the keyway with evidence of fatigue. The geometry of the keyway also promoted the initiation crack because the width and height were erroneously designed. It was concluded that all these factors produced fatigue failure.

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Brittle fracture of a grade E cast steel knuckle

This paper was published in « Case Studies in Engineering Failure Analysis » on April 2014. It investigated the brittle fracture mechanism of a grade E cast steel knuckle that is one of the key components of the coupler for railway wagon.

As a result, it can be inferred that under an impact load that did not exceed material fracture limit, the micro-cracks initiated from weld repair zone propagated rapidly into the inner matrix by continuously fracturing the dendrites along shrinkage porosity regions until the knuckle failed instantly.

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Analysis of abnormal fatigue failure of forklift forks

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

The analysis of an abnormal failure of forklift forks is presented in this work. The investigation results suggested that failure occurred due to fatigue mechanism followed by sudden overload fracture. The orientation of fatigue fracture indicates abnormal lifting operation, favouring crack initiation from outer fork area which is the compression designed zone. Moreover, various surface flaws and weakness areas (such as surface marks, decarburized microstructures and weld zones) identified on the outer fork zone, compromise fatigue strength inducing premature crack nucleation and fast growth towards final failure.

Read the article : click here

Fatigue fracture of cutter blade made of high-speed steel

An interesting  paper in « Case study in Engineering Failure Analysis » published on ScienceDirect.com. This paper presents the failure analysis of broken blade of the cutter Ku 500VX. The damage of the blade was caused by changes of the structure (formation of the brittle micro dendritic structure) that occurred during manual electric engraving process when the material was heated till its melting point. As a results the stresses occurred in surface what provided to micro cracking and to propagate the fatigue fracture. The origin of this fatigue fracture was in the place where the inscription was made.

Acceder article

Failure Analysis of Internal Combustion Engine Valves: A Review

An article published in « International Journal of Innovative Research in Science, Engineering and Technology« , december 2012.

Those study focuses on different failure modes of internal combustion engine valves, failures due to fatigue at high temperature, high temperature effects on mechanical properties of materials, like hardness and yield strength; wear failure which is due to impact loading, and wear rate that depends on load and time. For the study of fatigue life, a combined S-N (max. stress v/s number of cycles) curve is prepared. Such a curve helps in comparing the fatigue failure for different materials at different high temperatures and may also assist the researchers in developing the valve materials with a prolonged life.

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