There are two types of test use for testing the Impact resistance of any material one is Izod Impact resistance test and other is Charpy Impact resistance test. Both of them use the same principle to test the Impact resistannce of any material but still there are may difference in them and our today's article will show these difference between Izod and Charpy Impact testing
Position of specimen is both the experiment is different from each. In the Izod method, the test material was placed in a vertical position, while in the Charpy method, the test material was placed horizontally.
Point of Strike
Point at which the hammer strike the specimen is different for both of them. In Izod test hammer strike at the upper tip of specimen while in Charpy test hammer strike at point of notch but in opposite direction
Direction of Notch
Face of specimen which faces the striker is different. The notch face in the izod test is facing the striker, fastened in a pendulum, while in the charpy test, the notch face is positioned away from the striker.
Type Of Notch
In hardness testing two types of notches are used V-notch and U-notch. In the Charpy method, there are two kinds of notches, the V-notch and the U-notch, while in the Izod method, there is V-notch is used
Even if you are testing the same material the test specimens have different dimensions for each test. The basic Izod test specimen is 75 x 10 x 10mm (2.95" x 0.394" x 0.394"); the basic Charpy test specimen is 55 x 10 x 10mm (2.165" x 0.394" x 0.394")
Hammer which use as striker is different in both test. Izod use Farming hammer as striker where as Charpy use Ball Pin hammer as striker