Research was conducted to determine if a metalcasting facility could improve its monitoring of clay and moisture levels in green sand with non-standard testing methods, such as a thermal erosion test (TET) and modified cone jolt toughness test.
Physical, mechanical, and dynamic measurements were taken on the samples using a number of common testing procedures, though the major focus was on the thermal erosion test and modified cone jolt toughness tests.
Friability and wet tensile strength tests are currently used in the industry, the modified cone jolt and thermal erosion tests may allow metalcasters to improve the control of their green sand systems, in a more timely manner.
The point of inflection corresponds to the thermal erosion test data.
Thermal Erosion Testing: The thermal erosion test is similar to the friability test in purpose, but the information acquired is different.
When thermal erosion data is examined as compactability increases for the same level of clay in the green sand system, the percent green sand loss decreases at room temperature (Fig.
Owing to higher concentrations of heat-producing elements, the Earth must have generated more heat during the Archean, but many believe that once stabilized, continental keels were not subjected to thermal erosion
. Consequently, proportionally more heat must have been dissipated through the oceans.