Document Type: Original Article
Current study concentrates on the effect of friction pressure on the welding joint strength of AISI 316. Single factor method was used to evalute the friction pressure influence, whilst the other conditions keep constant. The experimental analysis were achieved by temperature measurement by infrared thermometer and thermometer by touch, where hardness Hv10 and micro-hardness Hv0.1 realized along the axial direction, tensile test with 8 mm diameter, scaning electronic microscopy (SEM) to observe tensile fracture surface and x-ray diffraction (XRD) to analyse the gamma iron concentration. The obtained results by high friction pressure provide to increased the temperature during friction and forging phase, elevated the hardness and micro-hardness values at the welding center, improved ductility and ultimate tensile strength (UTS). Whilst the central region of tensile fracture seemed had a ductile micro-porocities with different forms and dimensions, hence concentration of FCC structure of gamma iron clearly seemed at level of 111.