Comparative Study on Mechanical Properties of GMA Welded IRSM41 Mild Steel Plate Based on Grain Flow Direction

Abstract:

The purpose of this work was to study the mechanical properties of GMAW welded IRSM41 material based on the grain flow directions. It is a joining process that fuses the base metal to make the weld. The results were analyzed by means of the mechanical properties such as tensile strength, bend test, microstructure and hardness was carried out for both along and across the grain flow direction of the weldments. The important implication about grain flow is that some mechanical properties vary with respect to orientation of the grain flow. The strength and hardness are primarily varied based on the grain flow direction. The desirable properties associated with retarding crack propagation can see significant differences depending on the grain flow and the direction of the moving crack. So, properties like fatigue strength, impact toughness and ductility, which are measures of a material’s resistance to cracking (measured after fracture), can be significantly improved if the crack propagation direction and the grain flow are properly aligned. The optimum alignment occurs when the maximum principal stress (perpendicular to a potential crack or fracture) is aligned with the grain-flow lines. On testing the mechanical properties, it reveals that along the grain flow direction has 13.5% higher than the across the grain flow direction.

• Periodical: Applied Mechanics and Materials (Volume 854)
• Pages: 38-44
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.854.38
• Online since: October 2016
• Authors: R. Megavarnan, G. Rajamurugan*, R. Shanmuga Prakash
• Keywords: AC-Across the Grain Flow Direction, AL-Along the Grain Flow Direction, GMAW, IRSM41 Mild Steel

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