High-pressure torsion using ring specimens

摘要

A facility is developed for high-pressure torsion (HPT) using ring samples and the results are compared with those of conventional disk HPT samples. With pure Al(99.99 percent), both types of HPT are consistent. When hardness values are plotted against equivalent strain, they fall on a single line having a maximum at a strain of approx 2 followed by a steady-state at a strain of approx 6 or more where hardness remains constant with straining.