Strikingly Simple: How do you test a metal's resistance to impact?
For more than 100 years, scientists have tested the impact resistance of metals used in construction by employing an apparatus called a Charpy machine. This device has a long, weighted arm that swings like a pendulum. When the arm is released, it strikes a metal sample. Researchers measure the energy it took to break the sample in two. Credit: Jennifer Lauren Lee/NIST
February 26, 2018