br Experimental details The rolled

Experimental details The rolled plates of naval grade HSLA steel with thickness of 5 mm were cut to the required dimensions (100 mm × 150 mm) by abrasive cutting to prepare the joint configurations, as shown in Fig. 1(a) and (b). The chemical composition of parent metal is presented in Table 1. The microstructure of parent metal (Fig. 2(a) and (b)) is composed of ferrite with small amount of pearlite. A non-consumable rotating tool made of tungsten resperidone manufacturer alloy was used to fabricate FSW joints. The tool was manufactured through powder metallurgy route having a shoulder diameter of 25 mm and a tapered pin, tapering from 12 mm at the shoulder to 8 mm at the pin tip. The electrode for SMAW and filler wire for GMAW processes were supplied by Honavar Electrodes Pvt. Ltd. The basic classification of Mn and Ni base E 8018-C1 with nominal composition of 0.06% C, 1.8% Mn and 2.5% Ni electrode was used to weld the naval grade steels. The welding conditions and parameters used to fabricate the defect free joints are presented in Tables 2 and 3.
Results
Discussion
Conclusions In this investigation, an attempt was made to study the effects of welding processes by evaluating the weld metal microstructure and mechanical properties of naval grade high strength low alloy (HSLA) steel joints. From this investigation, the following important conclusions are derived:
Acknowledgements The authors are grateful to The Director, Naval Material Research Laboratory (NMRL), Ambernath for financial support through CARS project No: G8/15250/2011 dated 29.02.2012 and providing base material for this investigation. Also the authors are grateful to Dr. A.K.Lakshminarayanan, Associate Professor, SSN College of Engineering, Chennai, India for his valuable suggestions, guidance and discussion to carry out this investigation.