Abstract
This study focuses on the effect of friction pressure on the welding joint strength of AISI 316. Single factor method was used to evaluate the influence of friction pressure, whilst the other conditions kept constant. The experimental data were achieved by temperature measurement using infrared thermometer and thermometer by touch, where hardness Hv10 and micro-hardness Hv0.1 realized along the axial direction, tensile test specimen with 8 mm effective diameter, scanning electronic microscopy (SEM) to observe tensile fracture surface and x-ray diffraction (XRD) to analyze the concentration of gamma iron. The results by high friction pressure provide increased temperature during friction and forging phase, elevated hardness and micro-hardness values at the welding center, improved ductility and ultimate tensile strength (UTS). Whilst the central region of tensile fracture seemed most ductile mode and presence of micro-porosities with different forms and dimensions, hence concentration of face centered cubic (FCC) structure of gamma iron clearly revealed at level of 111.
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