Alteration in 1561 Alloy Bar Microstructure during Extrusion Process Carried out with an Increased Shear Component
The paper shows that in the case of multicycle extrusion under low extrusion ratio conditions, a nonrecrystallized fibrous structure with transverse grain size of 5-10 μm and subgrain size of 0.2-0.5 μm is developed due to an increased shear component. This structure ensures an improvement in UTS and El by 10 % and 30 % respectively in comparison with values of these properties offered by bars produced via the commercial production technology.