Numerical and Experimental Analysis of the Residual Stress and Microstructure in Stainless Steel Thin-walled Components Manufactured by Wire Arc Additive Manufacturing
Randomized trial investigates microstructure and residual stress during WAAM in stainless steel components, suggesting modifications can enhance performance.
Key Points
This study aims to investigate the evolution of microstructure and residual stress during the Wire Arc Additive Manufacturing of AISI 316L stainless steel.
Utilized numerical simulations and experimental techniques to analyze microstructure and residual stresses.
Analyzed microstructure with optical and scanning electron microscopy.
Measured residual stresses using neutron diffraction and a thermo-mechanical model for simulation.
Less than 10% of the microstructure consists of inter-dendritic δ-ferrite, providing high toughness.
Residual stresses reached 500 MPa in the constrained sample at the ends, explaining high cracking risks.
Microstructures showed periodic patterns with equiaxed dendrites at low G/R ratios and columnar structures at high G/R ratios.