FERRITE GRAIN SIZE AND MECHANICAL PROPERTIES IN THE WELD HAZ OF A HIGH-STRENGTH LOW-CARBON MICROALLOYED STEEL

Abstract

The process of Shielded Metal Arc Welding (SMAW) was used to join High-Strength Low-Alloy (HSLA) with AWS E7016 electrodes. The ABS EH36 steel was a part of HSLA grade. The testing forms of weld ability use to predict mechanical properties and microstructure. An investigation was carried out to determine mechanical properties in a hardness test (Vickers hardness tester) and tensile test. Microstructure as chemical composition analysis with a spectrometer, EDS analysis on the SEM with a scanning electron microscope and predicts the strength as the optical microscope (OM) that used the figure to find the grain size number by the intercept method and applied to use the value to find the yield stress with the Hall-Petch relationship. The result has a higher strength than HAZ and base zone respectively.