فهرست نشریات علمی دسترسی آزاد ایران

Materials with superior mechanical properties have a wide range of applications in various industries such as aerospace, automotive, medical, petroleum, and petrochemical. In this regard, although stainless steel 316 has desirable properties such as resistance to rust, corrosion, and creep, its performance still needs improvement. Therefore, by subjecting a steel part to shear deformation by the constrained groove pressing (CGP) process, it is possible to improve its grain structure and mechanical properties. By changing the upper die displacement during processing, the strain applied to a three mm-thick piece can be altered. In this study, an attempt has been made to investigate the effect of varying die displacement on the strain changes in a 316 steel plate in ABAQUS. The results indicate that as die displacement increases, the part's strain increases. If the amount of displacement increases so much that the distance between the two dies becomes less than the thickness of the steel plate, the strain increases, and the cross-sectional area of ​​the steel plate changes. While in displacements where the distance between the two sides of the die is greater than the thickness of the steel plate, the maximum strain does not occur at a distance equal to the thickness of the steel plate, but the maximum strain is achieved before reaching the thickness of the steel plate. In displacements of 12.58 to 12.88 mm, the strain rates are close to each other, but the maximum strain does not occur at the displacement of 12.88 mm; instead, the maximum strain is created in the first step at the displacement of 12.58 mm, and in the third step, at the displacement of 12.68 mm. At displacements lower than 12.88 mm in the first and third steps of the process, the shape of the part changes from trapezoidal to curved.