Jominy End Quench
Jominy End Quench - Related Videos
10:57
Quenching and Boiling
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2023
Source: Alexander S Rattner, Sanjay Adhikari, and Mahdi Nabil; Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA Controlled heating followed by rapid cooling is an important element of many materials processing applications. This heat-treating procedure can increase material hardness, which is important for cutting tools or surfaces in high wear environments. The rapid cooling stage is called quenching, and is often performed by immersing...
07:47
Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases
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Cited by 7 •
2016
Quorum-quenching enzymes are anti-virulent and anti-bacterial options that can mitigate pathogenesis without risk of incurring resistance, by preventing the expression of virulence factors and genes associated with antibiotic resistance and biofilm formation. In this study, we report a method that demonstrates the efficacy of quorum-quenching enzymes in bacterial biofilm disruption.
08:58
Cerebral Blood Oxygenation Measurement Based on Oxygen-dependent Quenching of Phosphorescence
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Cited by 28 •
2011
We present an experimental procedure for measuring the partial pressure of oxygen (pO2) in cerebral vasculature based on oxygen-dependent quenching of phosphorescence. Animal preparation and imaging procedures were outlined for both large field of view CCD-based imaging of pO2 in rats and 2-photon excitation based imaging of pO2 in mice.
08:07
Sample Preparation for Single Cell Mass Spectrometry Metabolomics Studies: Combined Cell Washing, Quenching, Drying, and Storage
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Cited by 1 •
2025
This protocol aims to preserve cell metabolites for single-cell mass spectrometry (SCMS) by combining volatile salt solution washing, rapid liquid nitrogen quenching, freeze-drying, and −8 °C storage. It demonstrates that liquid nitrogen quenching is essential for maintaining metabolite profiles, while prolonged cold storage should be minimized to prevent metabolic alterations.
10:55
Fluorescence-quenching of a Liposomal-encapsulated Near-infrared Fluorophore as a Tool for In Vivo Optical Imaging
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Cited by 15 •
2015
The use of fluorophores for in vivo imaging can be greatly limited by opsonization, rapid clearance, low detection sensitivity and cytotoxic effects on the host. Encapsulation of fluorophores in liposomes by film hydration and extrusion leads to fluorescence quenching and protection which enables in vivo imaging with high detection sensitivity.
FAQs
The water jet cools one end directly, while locations farther away experience progressively different cooling rates. This controlled variation creates a range of cooling conditions within one cylindrical specimen rather than producing a single uniform result. Measuring hardness at selected distances therefore reveals how the steel responds across changing cooling rates and indicates potential hardness and microstructure gradients through a component.
Alloy composition affects the steel’s ability to develop hardness through its section during cooling. Testing different compositions under the same standardized conditions allows engineers to compare their hardenability using the resulting hardness profiles. These comparisons support selection of a steel whose response is appropriate for the expected component geometry and intended heat-treatment process.
The curve shows how measured hardness changes with distance from the quenched end, linking the hardness profile to the cooling conditions experienced along the specimen. Its pattern helps engineers evaluate whether a steel can maintain useful hardness farther from a directly cooled surface. The same results also support predictions of microstructure and hardness gradients in larger sections.
A cylindrical steel specimen is first austenitized, then one end is quenched with a controlled water jet. After cooling, hardness measurements are taken at set distances along the specimen. Plotting those measurements produces the hardenability curve, which provides a consistent basis for comparing steels and examining how their hardness changes with distance from the quenched end.
Engineers compare the measured hardenability profile with the component’s section-size requirements. A steel that develops suitable hardness throughout the relevant section can be favored over one that hardens adequately only near a cooled surface. This use of the data helps connect laboratory results with heat-treatment planning for parts such as tools, shafts, gears, and structural components.
The test provides more than a single hardness measurement because it describes hardness behavior across a controlled range of cooling rates. Engineers can use that information to anticipate hardness and microstructure variation through a part, compare candidate alloys, and design processes suited to different section sizes. These decisions contribute to more reliable manufacturing and component performance.