Enhancement of Mechanical and Microstructural Properties of similar Mild Steel Welds under Vibratory Processing

This study investigates the influence of vibratory conditions on the mechanical and microstructural properties of MS-1018 samples. A comprehensive experimental approach was employed, which included Vickers hardness tests and metallographic analysis, to evaluate the effects of varying frequencies ranging from 0 Hz to 1800 Hz. The results of the Vickers hardness tests reveal a consistent increase in hardness with increasing frequency, reaching a peak average value of 196 HV0.5 at 1500 Hz. The process capability indices, with Cp = 63.18 and Cpk = 26.86, indicate high precision and reliability of the measurements. Metallographic analysis highlights significant microstructural changes, such as grain refinement and alterations in morphology, under vibratory welding conditions. Additionally, elemental composition analysis through Energy Dispersive X-ray Spectroscopy (EDS) confirmed that the material's composition is dominated by Carbon (31.89 wt%) and Iron (66.91 wt%), with minor contributions from Phosphorus, Sulfur, and Manganese. These results provide valuable insights into the optimization of vibratory processing techniques for enhancing material properties and weld quality.