The Effect of Lead on Micro-Crack Initiation and Propagation in Alloy Steels. Part a: Embrittlement of Leaded Steels at Intermediate Temperatures

摘要

A detailed investigation was made of the influence of 0.30% lead on the room and elevated temperature mechanical properties of a 4145 steel. Leaded and non-leaded versions of this identical steel were quenched and tempered to room temperature strength levels ranging from 120 to 240 ksi. The properties measured included both complete tensile data and impact energies for all strength levels. Macrofractographs detailing differences in fracture morphology at specific test temperatures were also included. (Author)