To study the effect of strain rate on tensile properties and high cycle fatigue behaviour of if steel

Abstract

Interstitial Free steel finds its application in automobile industries. Their extensive use in this industry is due to its excellent formability, weldability and toughness. These materials are usually exposed to various strain rates during service. In the present investigation an attempt has been made to study the effect of strain rate. And it has been found that as the strain rate of loading increases the strength of the material increases but the ductility decreases. Though enough information are available on the effect of low cycle fatigue on this type of material, however in many cases they are also exposed to high cycle loading condition. Therefore an attempt has been made to study the effect of high cycle fatigue with ómax close to the yield strength of the material. And a relation has been established between the stress ratio and the number of cycles to failure