Effects of Heat Treatment on Additively Manufactured 316L Stainless Steel

Abstract

The microstructure and mechanical properties of selectively laser melting (SLM)-manufactured 316L stainlesssteele were evaluated by scanning electron microscopy, tensile testing at ambient temperature andCharpy impact test. These samples were compared with as-built samples. Following heat treatment conditionswere used: 500 °C for 2/4 hours, 650 °C for 2 hours and 900 °C for 1 hour. Cooling took place infurnace and in furnace with opened valve. Compared to as built samples the heat treatment at lowertemperature negatively influenced elongation but increased the amount of energy absorbed by materialduring fracture.