Effect of tensile pre-strain at different orientation on martensitic transformation and mechanical properties of 316L stainless steel

• Main Authors: Wibowo, F., Zulfi, F. R., Korda, A. A.
• Format: Conference Proceeding
• Language: English
• Subjects: Austenitic stainless steels; Deformation; Elongation; Martensite; Martensitic stainless steels; Martensitic transformations; Mechanical properties; Optical properties; Rolling direction; Stainless steel; Strain; Ultimate tensile strength; X-ray diffraction; Yield strength
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.4974446

Deformation induced martensite was studied in 316L stainless steel through tensile pre-strain deformation in the rolling direction (RD) and perpendicular to the rolling direction (LT) at various %pre-strain. The experiment was carried out at various given %pre-strain, which were 0%, 4.6%, 12%, 17.4%, and 25.2% for the RD, whereas for LT were 0%, 4.6%, 12%, 18%, and 26% for LT. Changes in the microstructure and mechanical properties were observed using optical microscope, tensile testing, hardness testing, and X-ray diffraction (XRD) analysis. The experimental results showed that the volume fraction of martensite was increased as the %pre-strain increased. In the same level of deformation by tensile pre-strain, the volume of martensite for RD was higher than that with LT direction. The ultimate tensile strength (UTS), yield strength (YS), and hardness of the steel were increased proportionally with the increases in %pre-strain, while the value of elongation and toughness were decreased with the increases in %pre-strain.