Structure-Property Correlation of LRS (Grade-B) Steel Weldment
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Authors
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B. K. Mondal -
Department of Materials & Metallurgical Engineering, National Institute of Foundry & Forge Technology, Hatia, Ranchi - 834003 ,INJ. Maity
Keywords:
LRS (Grade-B Steel), MIG Welding, Weldment, Macrostructure, Microstructure, Hardness Variation, Tensile Properties, Fractography.Abstract
LRS (Grade-B) steel, a structural material used in ship hull, was MIG welded in Argo-shield atmosphere. Microstructure & hardness variations were studied across the weldment. Tensile properties and tensile-failed surfaces of parent steel and weld were also investigated. Structure of the weldment was correlated with its property and a comparison was made with the property of parent steel to ascertain the effectiveness of MIG welding. Considerable hardness & microstructural variation was found across the weldment. Weld hardness & tensile strength were found higher than that of parent steel indicating an expected satisfactory fatigue performance of weld in service.
