Stress corrosion cracking behavior of austenitic stainless steel in 3.5 wt % sodium chloride (NaCI) solution

Abstract

Stress corrosion cracking is the formation of brittle cracks in a normally sound material through the simultaneous action of a tensile stress and a corrosive environment. Stress corrosion cracking occurs when there have stress applied and chemical reaction to the samples. There have two types of cracking which intergranular and transgranular morphology. Mechanical properties of these specimens are investigated by using tensile test. This test is conducted by Universal Testing Machine (UTM). Specimens are immersed in 3.5 wt % NaCl for variety times which 10, 200, 400, 600, 800, 1000, and 1200 hours because to make data comparison. Microstructure analysis is conducted by using Scanning Electron Microscopy and Smile View software to determine the crack propagation on the specimen’s surface. Graph Crack lines vs Time was plotted to show the comparison when immersed in 3.5 wt % NaCl for variety time.