Influence of heat treatments on the fatigue strength performance of low carbon steels

Abstract

In this research work, the behavior of low-carbon steels is studied, taking as a reference the AISI SAE 1020 steel and the influence of heat treatments on fatigue resistance performance. Fatigue tests were performed under rotary bending conditions on Moore's machine, where 24 samples calibrated to a half-inch diameter were broken. The specimens were machined in accordance with the ASTM E-606 standard, which were classified into three groups with special characteristics, of 8 samples each, where the first group is composed of specimens without heat treatment, the second group are specimens with quenching and the last group of specimens with quetching and tempering; in the same way, 4 different weights were used, taking into account that the specimens were in the finite life zone with high cycling, and with this data the Wholer S-N curve was constructed. The curves construction of agreement to the data thrown in the tests concluded that the specimens with tempering treatment weaken the material compared to those that   have   tempering   treatment   since   this   improves   the property when applying large loads and when it approaches A finite life tends to behave like a material without treatment.