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mmwave
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The Jominy end quench test: Is it pronounced Jah-min-ee like Japan or Hominy like in hominy grits?
The Charpy test: Is it pronounced sharpy?
The Charpy test: Is it pronounced sharpy?
Originally posted by mmwave
The Charpy test: Is it pronounced sharpy?
The Jominy and Charpy tests are used to determine the mechanical properties of a material, specifically its hardness and toughness. This information is important for understanding the material's behavior under different conditions, such as impact or stress.
In the Jominy test, a cylindrical sample of the material is heated to a specific temperature and then quickly quenched by spraying water on one end. This creates a temperature gradient along the length of the sample, allowing for the measurement of hardness at different distances from the quenched end.
The Jominy test results can be used to determine the hardenability of a material, which is its ability to be hardened by heat treatment. This information is important for selecting the appropriate heat treatment process for a material.
The Charpy test involves striking a notched sample of the material with a pendulum to measure its resistance to fracture under impact. The energy absorbed by the sample is then used to calculate its toughness.
The results of these tests can be affected by various factors, such as the composition and microstructure of the material, the testing temperature, and the testing conditions (e.g. speed and direction of impact). It is important to carefully control these variables to obtain accurate and reliable results.