Characterizing Brittle-Fracture Resistance of Steel

摘要

The description of fracture resistance of steel in the ductile/brittle transition region is treated as a multi-parameter problem. Some metallurgical factors influencing two of the parameters (lower-shelf toughness and sharpness of the transition) are discussed. For a series of HSLA steels which are variants on ASTM A710A, removal of Copper increased the lower-shelf toughness and tended to sharpen the transition. Nickel removal also tended to sharpen the transition, while Carbon Niobium additions tended to smooth it. (Reprints).