Analysis of damage and failure behavior of additively manufactured stainless steel 316L by biaxial experiments

• Published in: Proceedings in applied mathematics and mechanics
• Main Authors: Gerke, Steffen, Diller, Johannes, Cruz, Leonardo D. Pérez, Blankenhagen, Jakob, Mensinger, Martin, Brünig, Michael
• Format: Journal Article
• Language: English
• Published: 30-10-2024
• ISSN: 1617-7061; 1617-7061
• DOI: 10.1002/pamm.202400018

The austenitic stainless steel AISI 316L (1.4404) is frequently used in medical applications as well as in aerospace and automotive industries due to its corrosion resistance and high ductility. Individual parts or smaller series as well as complex geometries can be additively manufactured by laser powder bed fusion (PBF‐LB/M). The components produced in this process generally have different mechanical properties compared to components made from conventionally produced base material by cutting machining processes. Furthermore, the multiaxial stress state behavior of PBF‐LB/M/316L has not been investigated in detail and is the subject of current investigations. This paper deals with an initial experimental series with additively manufactured biaxial specimens made of AISI 316L stainless steel. The biaxial specimen geometry has been specially adapted for the requirements of PBF‐LB/M and the specimens are loaded under different biaxial proportional load paths up to failure. Accompanying numerical simulations are performed to determine the associated stress states and to analyze the experimentally obtained stress‐dependent damage and failure mechanisms. The formation of strain fields in critical parts of the modified H‐specimen is monitored by digital image correlation and the different failure modes are visualized by scanning electron microscopy of the fracture surfaces.