Indian Journal of Engineering & Materials Sciences

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Effect of input variable of GMAW on microstructure and mechanical properties of High Strength Low Alloy


Affiliations
1 Carriage and Wagon, North-Eastern Railway, Gorakhpur, Uttar Pradesh 273 012, India
2 Department of Mechanical Engineering, Kamla Nehru Institute of Technology, Sultanpur, Uttar Pradesh 228 118, India
3 University Polytechnic, Jamia Millia Islamia, New Delhi 110 025, India

The present study focused on evaluating mechanical and microstructural properties of Gas Metal Arc (GMA) welded High Strength Low Alloys (HSLA) steel weldments at different heat inputs. Heat input plays a significant role in influencing welded joints' mechanical properties and microstructure. Nine different values of heat input were considered and the range of heat input value was from 1.89-2.61Kj/mm. From the results it was found that on increasing the heat input in the form of input parameters, the average Ultimate Tensile Strength (UTS) was increased and then decreased but at the same time grain coarsening in microstructure was also observed. From the rest result, it was also observed that on increasing the heat input value toughness of weldment also increases.
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  • Effect of input variable of GMAW on microstructure and mechanical properties of High Strength Low Alloy

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Authors

Saurabh Kumar Gupta
Carriage and Wagon, North-Eastern Railway, Gorakhpur, Uttar Pradesh 273 012, India
Rajnish Singh
Department of Mechanical Engineering, Kamla Nehru Institute of Technology, Sultanpur, Uttar Pradesh 228 118, India
Saadat Ali Rizvi
University Polytechnic, Jamia Millia Islamia, New Delhi 110 025, India

Abstract


The present study focused on evaluating mechanical and microstructural properties of Gas Metal Arc (GMA) welded High Strength Low Alloys (HSLA) steel weldments at different heat inputs. Heat input plays a significant role in influencing welded joints' mechanical properties and microstructure. Nine different values of heat input were considered and the range of heat input value was from 1.89-2.61Kj/mm. From the results it was found that on increasing the heat input in the form of input parameters, the average Ultimate Tensile Strength (UTS) was increased and then decreased but at the same time grain coarsening in microstructure was also observed. From the rest result, it was also observed that on increasing the heat input value toughness of weldment also increases.