Effect of Metal-Cored Filler Wire on Surface Morphology and Micro-Hardness of Regulated Metal Deposition Welded ASTM A387-Gr.11-Cl.2 Steel Plates

Environmental and human-friendly welding is the need of the hour. In this context, this study explores the application of the regulated metal deposition (RMD) technique for ASTM A387-Gr.11-Cl.2 steel plates. To examine the effect of metal-cored filler wire (MCFW), MEGAFIL 237 M was employed during r...

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Bibliographic Details
Published in:Materials 2022-09, Vol.15 (19), p.6661
Main Authors: Bandhu, Din, Djavanroodi, Faramarz, Shaikshavali, G., Vora, Jay J., Abhishek, Kumar, Thakur, Ashish, Kumari, Soni, Saxena, Kuldeep K., Ebrahimi, Mahmoud, Attarilar, Shokouh
Format: Article
Language:English
Subjects:
Deposition
Efficiency
Fillers
Flow velocity
Gas flow
Hardness
Heat
Heat treatment
Lasers
Manufacturers
Martensite
Mechanical properties
Microhardness
Morphology
Optical microscopy
Residual stress
Steel
Steel plates
Welding
Wire
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Summary:Environmental and human-friendly welding is the need of the hour. In this context, this study explores the application of the regulated metal deposition (RMD) technique for ASTM A387-Gr.11-Cl.2 steel plates. To examine the effect of metal-cored filler wire (MCFW), MEGAFIL 237 M was employed during regulated metal deposition (RMD) welding of 6 mm thick ASTM A387-Gr.11-Cl.2 steel plates. The welding was carried out at an optimized current (A) of 100 A, voltage (V) of 13 V, and gas flow rate (GFR) of 21 L/min. Thereafter, the as-welded plates were examined for morphological changes using optical microscopy. Additionally, the micro-hardness of the as-welded plates was measured to make corroboration with the obtained surface morphologies. In addition to this, the as-welded plates were subjected to heat treatment followed by surface morphology and micro-hardness examination. A comparison was made between the as-welded and heat-treated plates for their obtained surface morphologies and microhardness values. During this, it was observed that the weld zone of as-welded plates has a dendritic surface morphology which is very common in fusion-based welding. Similarly, the weld zone of heat-treated plates has a finer and erratic arrangement of martensite. Moreover, the obtained surface morphologies in the weld zone of as-welded and heat-treated plates have been justified by their respective hardness values of 1588.6 HV and 227.3 HV.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15196661