Abstract
The tensile behavior of JIS AC8A castings at elevated temperatures was experimentally studied for elucidating a basic process of occurrence and propagation of thermal cracks. Tensile test was performed at a given temperature in the range from room temperature to liquidus and at a fixed strain rate from 10−1 to 10−4/s in the air. Mechanical properties and behaviors of the alloy at elevated temperatures such as tensile strength, deformation behavior and fracture pattern changing with temperature are clarified. Empirical relationships of strength, temperature and strain rate are introduced.
