Evaluation of residual stresses in CO₂ laser beam welding of SS316L weldments using FEA

Abstract

Laser welding is used in critical component production when tight tolerances like minimal distortions and residual stresses are required. Laser beam welding offers a lower heat input, a smaller heat affected zone, lower residual stresses, minimum distortions, and greater mechanical joint characteristics than conventional welding does. In order to simulate the laser welding process used on SS316L plates, the Gaussian heat source model was used. The model is developed and simulated with volumetric heat source model with APDL coding using ANSYS. The thermal profiles at the joint cross sections via welded area, interface across joints is taken for the analysis. The maximum temperature was observed at the fusion zone and associated zones. The residual stresses are analysed in the same path and found the stresses are in safe limits of base material. Predicted and experimentally measured residual stresses are close agreement with 10%.

Exploring Microstructural, Interfacial, Mechanical, and Wear Properties of AlSi7Mg0.3 Composites with TiMOVWCr High-Entropy Alloy Powder

“…FSP involves using a rotating tool to stir and consolidate materials in the solid state, facilitating the incorporation of reinforcement materials into an Al matrix. , This leads to enhanced mechanical properties, improved wear resistance, and increased strength without sacrificing the inherent lightweight nature of aluminum . The FSP technique offers precise control over the composite’s microstructure and properties, making it a promising approach for tailoring materials to specific applications in industries ranging from aerospace to automotive and beyond …”

Physicomechanical, Wettability, Corrosion, Thermal, and Microstructural Morphology Characteristics of Carbonized and Uncarbonized Bagasse Ash Waste-Reinforced Al-0.45Mg-0.35Fe-0.25Si-Based Composites: Fabrications and Characterizations

“…The porosity may be caused by inadequate particle dispersion, insufficient compaction throughout fabrication, or other processing issues. Because they serve as stress concentration points and have a lower load-bearing capacity, these voids can change the mechanical characteristics of the composites …”

“…For both uncarbonized bagasse and carbonized bagasse, 6.25 wt % reinforced composite has a lower tensile strength than aluminum alloy AA6063. As a result, no more increases in the matrix material’s weight percentage of reinforcing particles were developed …”

“…Poor interfacial bonding, particle agglomeration, and the existence of flaws like porosity and blowholes are some of the reasons why tensile strength declines in composites like the AA6063 aluminum alloy/3.75% carbonized WBA composite commonly arise. The deterioration in tensile strength and the appearance of porosity and blowholes can be enumerated by the following findings when analyzing tensile fractography-based SEM microimages …”

“…Stress concentrations can develop in regions in which carbonized WBA or uncarbonized WBA particles are insufficiently bonded to the AA6063 matrix. The tensile strength of these interfaces may be reduced, and they may develop localized failure points …”