The effect of temperature and strain rate on the mechanical properties and microstructure of super Cr13 martensitic stainless steel

• DOI: 10.1016/j.jmrt.2023.04.012
• Publication Date: 2023-04-06T16:30:08Z
• Authors: Hamed Aghajani De...; Eduardo Garcia; Alberto Murillo-M...; Jens Hardell
• Keywords: Fractography; Tensile testing; Elongation

In this study, the formability of super Cr13 martensitic stainless steel (MSS) is examined by means hot tensile tests at different temperatures (900 o Ce1100 C) and t strain rates (0.01s À1 -10s ).The potential effect on mechanical properties, microstructure fracture surface MSS were examined.The post-test analysis, which includes hardness measurements, X-ray diffraction (XRD), analysis scanning electron microscope (SEM), Energy-dispersive spectroscopy (EDS), was carried out.Results show that ultimate stress (UTS) decreases with temperature, way, highest UTS obtained 900 C-10s (187 MPa), while lowest (38 MPa) in 1100 C-0.01s sample.By contrast elongation material increases rate, since sample near 16% 57%.The XRD EDS indicated Cr 23 C 6 2 N are formed inside samples tested between 1000 C, these carbides dissolved above C. Temperature affects also retained austenite temperature.Fractography d-ferrite phase has a primary role hightemperature rapture.Fracture evaluation revealed semi-ductile behaviour below low rates, ductile detected higher than high rates.Furthermore, ductility increased increasing rate.