Corrosion‐fatigue behaviour of Cr–Mo steel under biaxial tension

Abstract

Combined cyclic tension and internal pressure tests with various proportions of each loading were run on a 2.5%Cr-1%Mo steel in air and in 3.5% NaCl solution, with and without cathodic protection to investigate the effect of positive stress biaxiality on corrosion-fatigue lives and damage mechanisms. At free potential, a strong reduction in fatigue resistance was observed for uniaxial as well as for equibiaxial cyclic tension and attributed to multiple crack initiation from corrosion pits. Cathodic protection completely cancelled the detrimental effect of the corrosive environment on fatigue lives whatever the load biaxiality was, in spite of an obvious enhancement of intergranular fracture attributed to hydrogen embrittlement.

An Experimental Analysis of the High-Cycle Fatigue Fracture of H13 Hot Forging Tool Steels

“…Therefore, no signs of fatigue limit were observed for the CF tests within the stress levels that they were subjected to in this study. All of the mentioned observations of the CF curves were in accordance with the contributions of other researchers [ 39 , 40 ].…”

Advances in Fatigue Prediction Techniques

“…When we talk about the welded structure, the analysis of fatigue properties becomes even more critical. Whether solid-state or fusion [8][9][10][11][12][13][14][15], the welding processes can be considered the most widely used joining method to fabricate metallic structures, components, bridges, cranes, low and heavy-duty machines, etc. Several of these are designed and developed to have sustainability for a more extended period under fatigue loading.…”