الفهرس 
Results and DiscussionOnly 14 pages are availabe for public view
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Abstract
A practical investigation of the plane bending fatigue proprties of low carbon steel welded joints.
Two types of welding process considered in this sissertation (Gas Tungsten Are Welding GTAW and Flash Welding FW).
A plane bending fatigue machine was constructed for the purpose of fatigue testing. The fatigue machine uses eccentric sleeve connected to a connecting rod to ensure large variety of deflections lead to variety of stress amplitude. The study includes the investigation of tensile properties, fatigue behavior and microstructure examination for the as weld and stress relieved condition for the various types of welding processes used.
The results of plana bending fatigue tests indicated that the welded hoints is low carbon steel exhibits a lower resistance to fatigue failure compared with parent metal and this may be attributed to the metallurgical chagnes occurred during welding. Stress relieving does not show any siginficant change of the results over the as weld condition and this because of the reductio of residual stresses occurred during welding.
The investigation of fracture surface using SEM shoed that the fracture mode was transgranular and striation lines were observed in some specimens which exhibits low stress level.