The Influence of Grain Size of Dissimilar Welding between Carbon Steel and Stainless Steel on Ultrasonic Testing

Abstract

The objective of this research is to study the ultrasonic attenuation effect on metallurgical properties of specimens. This study uses the various metallurgical grain sizes, using the ANSI1025 grade low carbon steel and ANSI316 grade stainless steel as base metals and shielded metal arc welding with E309L16 to create the discontinued area at the center of fusion zone and the fusion line. Both sides of the specimen are further tested with ultrasonic tests to determine the artificial discontinuity. It was found that different grain size has different effect from different specimens related to attenuation absorption rate. The result showed area created artificial discontinuity at the fusion line from ultrasonic testing only. The beneficial from this particular research work has lead to better understanding on the limitation of testing for the welding fusion zone between carbon steel and stainless steel, and will provide important information toward the selection of non-destructive testing (NDT) method for testing area of fusion zone discontinuity.