Failure Analysis of Fractured Tool Steel Die Plate
This paper details the failure analysis of fracture tool steel die plate, which was a new material for an application and was found cracked after approximately only 30 minutes of service. It highlights how metallographic examinations revealed multiple cracks in the nitride case along all of the cap screw holes, and how microhardness testing at approximate depths of 0.002-in. showed an extremely...
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Failure Analysis of Ball Bearings
This paper explains about the metallurgical analysis conducted on the ball bearings, which have suffered severe deterioration of their grease. It highlights the visual examination of the ball bearings that showed no signs of mechanical, electrical, or corrosion damage on the outer surfaces of the seized bearings. It briefs about the scanning electron microscopic examination of a large and small...
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Fatigue Fracture of a 300M Ultra-high Strength Steel Race Car Transmission Input Shaft
Briefing about a 300M steel race car transmission input shaft, this paper provides a clear description of a metallographic analysis, which indicated that fatigue progression from an intergranular stress crack, initiated at a dot peen identification marking on the shaft caused the fracture of the input shaft. It reviews the spectrographic chemical analysis of the input shaft, and hardness testing...
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Stress Corrosion Cracking and Intergranular Corrosion of a 316Ti Stainless Steel Preheater Tube
This paper details about the failure analysis of a cracked stainless steel preheater tube that indicated ID initiated, transgranular, and chloride stress corrosion cracking near tubesheet interface at the transition of a roll expansion caused the failure of the preheater tube. It highlights how the presence of sulfur and chlorine exhibited in elemental analysis of the opened crack surface and...
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Heavy Equipment Acoustical Treatment Guide
Within this guide, you'll find information, tips, and solutions to help you to create a reduced-noise-level environment to increase operator effectiveness and improve output.
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Analyses of Superheater Tube from Boiler
This paper explains about a failure analysis of superheater tube, which was ASME SA-213 Grade T11 tube in service for 6 to 8 years in a boiler. It details regarding the visual examination, tube material chemical composition, tube dimensions, metallography, scanning electron microscopy and energy dispersive x-ray spectroscopy, and hardness test of the superheater tube during the failure analysis...
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Analysis of Chloride and MIC Pitted Still Condenser Tubes
This paper details about the analysis of chloride and MIC pitted still condenser tubes, which are ¾-in. x 0.049-in. wall thickness and are manufactured from 304L stainless steel. It reviews how chloride pitting initiated on tube outer diameter surfaces, and highlights that microhardness testing revealed the material is at the high end of hardness for this grade in the proper annealed condition....
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Analysis of Cracked Impeller Blade
Providing a brief overview about the condition of two 17-4 PH stainless steel impeller blade specimes, this paper details about the metallurgical analysis, which explained the different reasons that caused the centrifugal blower impeller blade to crack. It highlights how back-scattered SEM imagery was used in an attempt to resolve fracture features more clearly, due to its sensitivity to...
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Development of Graphite Foam Cooled Light-Emitting Diode (LED) Streetlight
Highlighting how graphite foam can help in reducing the temperature in a Light-Emitting Diode (LED) streetlight, this paper explains how the graphite foam cooled LED streetlight was developed. It discusses the attributes of the graphite foam that helps in cooling the driver and the LED board of these streetlights which get heated during the conversion of alternate current (ac) to direct current...
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Demystifying Ball Spline Specs
Stating that the ball splines can be configured for an endless number of automated operations, such as high-speed motion and high-speed rotation, this paper explains most important factors of the ball spline bushing that help for identifying the right ball spline for any application. It highlights that the ball spline combines a linear bushing (nut) that can handle greater moment loads and, a...
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Water Accountability
This paper describes how Stingray Level-Velocity Loggers from Greyline Instruments helped solve the excess inflow issues at the Glen Walter Township's sewage treatment plant. A brief overview of the capacity of and concerns faced by the Glen Walter Sewage Collection system is provided, stating how the Stingray Level-Velocity Loggers were used to monitor and capture the detailed flow information...
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Eliminate Expensive Repairs with the Hot-Shot Pipe Thawing Machine
The new Hot Shot Pipe Thawing Machine delivers an innovative and highly effective approach to thawing frozen pipes. Easy to use and versatile, it is loaded with robust features that further suit it to many challenging environments. To learn all about it, see our video.
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