PSI - Issue 14

P D Gosavi et al. / Procedia Structural Integrity 14 (2019) 304–313

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P D Gosavi et al./ Structural Integrity Procedia 00 (2018) 000 – 000

Weld chemistry changed to a certain extent with different welding processes and as a result the P cm value varied. With P cm value the proportion of AF varied indicating the significance of P cm value on weld metal properties. With highest P cm value of 0.27 highest level of AF was obtained. Fractographs indicates more energy was absorbed by microvoids coalescence in case of W2 (GTAW) which shows more percentage of ductile failure followed by W4 and W1 shows both type of failure in considerable manner and W3 shows clearly brittle failure at -40° C. Acknowledgement The authors are acknowledged for technical and financial support of The Director, Naval Materials Research Laboratory (NMRL), Ambernath. References Viano D.M., Ahmed N.U., Schumann G.O., 2000. Influence of heat input and travel speed on microstructure and mechanical properties of double tandem submerged arc high strength low alloy steel weldments. Journal of science and technology of welding and joining, Vol.5 , pp. 26-34. Dhua S.K., Mukerjee D., Sarma D.S., 2002. Weldability and microstructural aspects of shielded metal arc welded HSLA-100 steel plates. Iron Steel Inst. Jpn. Int., pp.290-298. Babu S. S., 2004. The mechanism of acicular ferrite in weld deposits Current Opinion. Solid State &Material Science, pp.267-278. Loder D., Mayerhofer A., Michelic S. K., 2016. On the Formation Potential of Acicular Ferrite Microstructure in Different Steel Grades Focusing on the Influence of Carbon Content. AISTech. Bhadeshia, H. K. D. H. 1992. Modelling of steel welds; Materials Science and Technology. 8(2), 123 – 133. Sarma D. S., Karasev A. V., Jönsson P. G., 2009. On the role of non-metallic inclusions in the nucleation of acicular ferrite in steels. ISIJ International, 49(7), 1063 – 1074. Loder D., Susanne K. , Bernhard M., Bernhard C., 2017. ‘Acicular Ferrite Formation and Its Influencing Factors - A Review’ Journal of Materials Science Research; Vol. 6, No. 1; Khaki D.M., Ayaz M., Arab N.B.M., Noroozi A., 2013. Multi-response Optimization of Mechanical Properties and Formability of Hot Rolled Microalloyed Steels. Journal of Materials Engineering and Performance 23(3), 1002-1015.