Test Method : Each of the two samples submitted for the Impact Test were tested as received, at room ambient conditions, there was no conditioning required.
As Test-Fixture was assembled which included a Gardner Laboratory Model 1053 Impact Tester, equipped with an Impact Dark. The Dart exhibited a weight of 10 pounds, approximately 0.575”.
A solid steel block was used as base upon which the sample to be tested was placed, to ensure that the height measurement was corrected to the point of Impact.
The Red-coated sample was tested first, followed by Blue-coated sample.
Each sample was subjected to a series of seven (7) Impacts; each Impact was conducted on the same surface, approximately one-inch distant from the previous.
Each Impact Point was identified on the sample, immediately following the Impact, to enable subsequent macro-microscope examination.
Each sample was subjected to the following Impacts, using the standard 10 pound Dart :
Drop Height : 6, 12, 18, 24, 30, 36, 42 inches (42” drop height is the limit of the Gardner Laboratory Impact Tester).
Following completion of seven (7) Impact on each of the two (2) tested samples were subjected to macro-microscopic evaluation at a magnification of 8X, at each of the Impact points. |