Correlation between Fracture Toughness, Charpy V-Notch Impact Energy, and YieldStrength for ASTM A723 Steel

摘要

A large quantity of data for ASTM A723 steel correlating yield strength, Charpyimpact energy, and fracture toughness has been compared with the Rolfe-Novak-Barsom correlation. The general conclusion is that this correlation is conservative, because if we estimate fracture toughness from Charpy impact energy measurements, the estimated toughness is less than the measured value. The data may be somewhat questionable, however, because the fracture toughness and Charpy impact energy measurements were taken at different temperatures. The results indicate that for correlation purposes, the Rolfe-Novak-Barsom relationship is an adequate estimate of fracture toughness based on Charpy impact energy and yield strength measurements.