Study the Effect of Quenching and Tempering Conditions on the Fatigue Coefficients for Low Carbon Steel

Four groups of AISI 1020 specimens were heat-treated at 850 °C in a muffle furnace for 30 minutes then quenched oil. The samples tempered 400 with time period each group as (group B, 2 hours), C, 3 and D, 4 hours). mechanical properties the studied using universal tensile testing equipment Brinell hardness machine. values calculated from given modified equation. torsional fatigue behavior was discovered this investigation compared original specimens. All subjected to an analysis optical microscope. Pearlite is formed when heated austenitic region cooled below lower critical temperature. It concluded that heat treatment increases while decreased shear ductility coefficient. Also, increased strength Furthermore, increasing tempering process leaded decrease coefficient ductility.