Failure analysis of a burner ring made of 20Cr32Ni1Nb alloy in gas turbine combustion chamber

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

The failure analysis of an insert ring of a burner in a 156 MW gas turbine, made of 20Cr32Ni1Nb alloy is presented. Normally, the useful service life of these parts under ideal conditions is about 30000 hours. However, more likely fracture and failure could be observed in5000-hour inspections, which resulted in the early and premature replacement of these parts. This paper brings out the detail of investigation carried out.

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Failure analysis of cracked Brass turrets used in electronic circuits

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

This paper describes cracking of turret terminals made of free cutting brass during swaging operation. The crack propagation tendency during cold working of brass turret terminals made from different compositions is studied through optical and scanning electron microscopy. Finally, composition for obtaining crack free terminals during swaging is suggested for applications involving cold swaging.

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Defects and long term crack growth in rolled bars

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Thesis WorkA Thesis work of  Högskolan Dalarna, Falun, Sweden online on http://www.diva-portal.org/.

This work has had the purpose to examine defects and the cause of crack growth during long termstorage in rolled bars. The bars in question are rolled and stored at Ovako in Hofors. The problem is approached by theoretically examining the possibilities of hydrogen damage, room temperature creep and naturally occurring porosity.

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Failure cause analysis of deaerator/sourgas stripper cylinder

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

Circular penetrable cracks occurred at the converge region of upward acid media (H2S and HCOOH) in the opposite position of traverse vapor ingress pipe of the lower part of the upper sealing head of the deaerator/sourgas stripper during the operation of the deaerator/sourgas stripper of the ammonia unit in a chemical fertilizer plant.

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Surface Defects in Rails

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Rail defects Handbook ASA 4An other publication of the Asset Standards Authority (ASA), an independent unit established within Transport for NSW of Australia.

This manual provides guidelines for the identification of rail surface defects during track inspections. The manual is part of RailCorp’s engineering standards and procedures publications. More specifically, it is part of the Civil Engineering suite that comprises standards, installation and maintenance manuals and specifications. Manuals contain requirements, process and guidelines for the management of civil assets and for carrying out examination, construction, installation and maintenance activities.telecharger le doc

Rail Defects and Testing

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Rail defects Handbook ASA 3An other interesting publication of the Asset Standards Authority (ASA), an independent unit established within Transport for NSW of Australia.

This manual provides requirements, processes and guidelines for the testing of rail for internal defects and for the acceptance testing of rail welds and weld repairs. The manual is part of RailCorp’s engineering standards and procedures publications. More specifically, it is part of the Civil Engineering suite that comprises standards, installation and maintenance manuals and specifications. Manuals contain requirements, process and guidelines for the management of track assets and for carrying out examination, construction, installation and maintenance activities.telecharger le doc

 

Railway Wheel Defects Manual

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Rail defects Handbook ASA 2An interesting publication of the Asset Standards Authority (ASA), an independent unit established within Transport for NSW of Australia.

Wheels with defective wheels may cause damage to both the track and the vehicle or lead to derailment. This Wheel Defect Manual  provides staff with a summary of wheel conditions under which wheels may continue in service and operating restrictions imposed for defective wheels found on vehicles operating on the RailCorp network.telecharger le doc

 

The Rail defects Handbook of the ASA

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Rail defects Handbook ASA 1
An interesting publication of the Asset Standards Authority (ASA), an independent unit established within Transport for NSW of Australia.

The occurrence of rail defects has generally increased because of the much longer rail lives obtained through various improvements, which have reduced the rail wear and hence have allowed the defects to develop. The main purpose of this Handbook is to describe some of the more common rail defects, their causes, and the possible ways of controlling their development.telecharger le doc

Analysis of plastic conveyor Slat belt

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automotive failuresA interesting paper in « International Journal of Advance Engineering and Research Development » (IJAERD) published on ijaerd.co.in.

Abstract- McCain Foods, an MNC, manufacturer and supplier of FMCG products located in Gujarat, India was experiencing frequent breakdown in operations. During inspection, the plastic conveyor belt  and gear mechanism were suspected. Stress analysis of a standard plastic modular link of different  height is done using finite element methods. The mechanical behavior of a standard Slat chain which is loaded by the maximum allowed load are considered. The Finite Element analysis has been proved appropriate tool as compared to theoretical computations

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Failure analysis of cracked Brass turrets

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A interesting paper in « Case study in Engineering Failure Analysis » published on ScienceDirect.com. Copper alloys are widely used in electrical circuits mainly due to their electrical conductivity. This paper describes cracking of turret terminals made of free cutting brass during swaging operation.

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