Experimental Investigation of Friction Pressure Influence on the Characterizations of Friction Welding Joint for AISI ۳۱۶

This study focuses on the effect of friction pressure on the welding joint strength of AISI ۳۱۶. 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 Hv۱۰ and micro-hardness Hv۰.۱ realized along the axial direction, tensile test specimen with ۸ 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 ۱۱۱.

کلیدواژه ها:

Austenitic stainless steel ، Friction pressure ، Hardness ، Micro-hardness ، Ultimate Tensile Strength