A procedure in which the work piece is quenched, and held for some time, in a fluid which is held at a constant temperature between the solution treatment temperature and room temperature. This permits precipitation hardening.
Izod Test Impact Test, Charpy Test, Fracture Test
A test in which the test piece is notched and broken. The fracture surface examined to assess grain structure and freedom from defects.
Also used to determine toughness, often at varying temperatures to establish at what reduced temperature the material becomes brittle.