Three-Point Bending Fatigue Tests of Welded Material Using the SEM Servopulser

User Benefits

- The SEM Servopulser and EPMA can perform three-point bending fatigue tests of welded material and analyze the factors causing failures. - The SEM Servopulser can also be used to observe fatigue cracks. - High-accuracy dynamic control can be achieved with the Servo Controller 4830.

Introduction

Welding is used extensively in industries such as construction, transport vehicles including automobiles and aircraft, and in the electronic and electrical industries, where it is indispensable. However, when a welding defect causes an accident, it can have serious or even devastating effects. Therefore, the evaluation of the long-term reliability and durability of welds is very important. This article describes the preparation of test specimens with two types of ferrous metal welded in the center and three-point bending fatigue tests performed on them using the Servopulser tabletop dynamic and fatigue testing system. After the tests, the fracture surfaces of the test specimens were observed using the electron probe microanalyzer (EPMA). In addition, the extension of cracks during the fatigue tests was observed using the SEM Servopulser, a high-temperature fatigue testing machine with a scanning electron microscope.

November 19, 2024 GMT