Material Testing

What is the Rockwell Test? What is the Charpy test?

Hint
One test commonly creates a notch in the test material. The other test utilizes an indenter.
Hint 2
One test measures hardness, while the other measures energy.
The Charpy test measures the energy required to fracture a specimen at a given temperature. It is a common test in industry, and is relatively simple and inexpensive to prepare. In most standardized procedures, a notch is made in the test material to determine the amount of energy absorbed during a fracture.

The Rockwell test measures the hardness of materials by pressing an indenter into the specimen with a pre-determined load. Measurements can then be made of how far the indenter was able to penetrate the test material.
The Charpy test measures the energy required to fracture a specimen at a given temperature. The Rockwell test measures the hardness of materials by pressing an indenter into the specimen with a pre-determined load.