Fogli bianchi

Fogli bianchi

Materials Matter: Nitriding’s “White Layer” and Isotropic Superfinishing

Developed in the early 20th century, nitriding has evolved into a standard process across many industrial applications. Often considered the simplest technique for case hardening, the process is commonplace in aircraft manufacturing, bearings, automotive components, turbine generation systems, and various industrial machineries.

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Repairing Wind Turbine Gears and Assemblies with Isotropic Superfinishing

As the wind turbine industry matures, the importance of operations and management (O&M) costs grows. In the early years of large kilowatt and small megawatt class wind turbines, pre-mature gearbox failure due to gear fatigue was very common and was a significant issue for wind turbine gearbox manufacturers, wind turbine OEM’s and owner-operators.

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Oil-Out Endurance Under the Lens

Oil-out conditions, or conditions in which an aircraft is operating without any oil in its gearbox or transmission, are devastating for an aircraft’s hardware.

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Materials Matter: Additive Manufacturing: Challenges, Possibilities, and the Gear Industry

Additive Manufacturing (AM) is a technology that has the potential to fundamentally alter manufacturing, specifically metal manufacturing. The ability to design complex shapes, which could not otherwise be manufactured, coupled with a significant reduction in scrap metal, has obvious benefits.

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Materials Matter: Gear Corrosion in the Manufacturing Process

No matter how well gears are designed and manufactured, gear corrosion can occur during the manufacturing process, which may, in turn, result in catastrophic failure.

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Materials Matter: Comparing Surface Roughness Parameters

Effective gear design must account for a range of potential failure modes. As discussed in previous Materials Matter columns, gear failure modes can be fatigue-based and progressive (such as micropitting) or sudden (such as scuffing).

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Materials Matter: Lambda Ratio

The lambda ratio was originally developed to quantify the quality of lubricant operating regimes relative to bearing performance.

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Materials Matter: Micropitting

Micropitting is a gear failure mode that typically occurs when higher contact stresses are applied to hardened gear teeth. Unlike most other failure modes, micropitting does not always proceed to component failure if left unaddressed.

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Materials Matter: Scuffing

Gear meshing is one of the most complex areas of study in tribology. Meshing consists of both sliding and rolling motion and can be affected by a number of other operating parameters.

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Materials Matter: Wind Turbine Gear Repair

Due to the large installed base of wind turbines, demand for gearbox repairs has risen steadily in recent years. Isotropic […]

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Materials Matter: Power Density and Isotropic Superfinishing

Power density, also described as load-carrying capacity, is simply the amount of load that can be safely transferred by a gear or other power transfer component without failure.

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Materials Matter: Roughness Measurement of Precision Gear Teeth

Over the past 25 years, industries such as power generation, aerospace, automotive, and others have continuously increased the operational demands of gearboxes.

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