| Summary: | 316L stainless steel has many industry applications due to its excellent corrosion and oxidation resistance. Laser powder bed fusion (LPBF), a metal additive manufacturing process, is used to fabricate 316L in the current work. Epitaxial grains can be observed in as-built material. LPBF-processed 316L demonstrates both high strength and ductility at room temperature. The yield strength is 609 MPa; the UTS is 722 MPa; the elongation is 62%; LPBF-processed 316L fractured high −196 °C shows an increased strength with good ductility due to transformation induced plasticity (TRIP) and twinning-induced plasticity (TWIP). The yield strength is 818 MPa; the UTS is 1349 MPa; the elongation is 39%. The formation of deformation twinning is significantly retarded when the testing temperature reached 200 °C. At 550 °C and 600 °C, tensile curves with serrated flow were observed which is associated with dynamic strain aging (DSA). Further increasing the testing temperature to 800 °C, the yield strength was decreased to 230 MPa and the UTS was decreased to 239 MPa with an elongation of 29%. Dynamic recrystallization was observed. The short elongation obtained at 800 °C was a result of the occurrence of high temperature creep.
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