Effects of surface finishes, heat treatments and printing orientations on stress corrosion cracking behavior of laser powder bed fusion 316L stainless steel in high-temperature water

• DOI: 10.1016/j.corsci.2024.112118
• Publication Date: 2024-05-08T16:05:45Z
• Authors: Zaiqing Que; Tuomas Riipinen; Pedro Ferreirós; Sneha Goel; Konsta Sipilä; Timo Saario; Tiina Ikäläinen; Aki Toivonen; Alejandro Revuelta
• Keywords: 0203 mechanical engineering; Laser powder bed fusion; Surface treatment; and Infrastructure; Stress corrosion cracking; 02 engineering and technology; Innovation; Heat treatment; SDG 9 - Industry; High-temperature water; Stainless steel

Stress corrosion cracking (SCC) of laser powder bed fusion 316 L stainless steel in oxygenated high-temperature water environments with chloride addition at 288 °C was studied. The influences of surface finishes (as-built, mechanically polished, Hirtisation® and shot peened), heat treatments (solution annealing at 1066 and 1150 °C and hot isostatic pressing) and the printing orientations on SCC were evaluated. Hirtisation resulted in a lower SCC susceptibility than as-built or polished surface while shot peening showed the lowest apparent SCC resistance. A high annealing temperature decreases SCC resistance. The effect of printing orientation is material and environment dependent.