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Investigation of post weld heat treatment on mechanical properties of low frequency vibration assisted SMAW mild steel welded joints
In applications involving high temperatures, welded mild steel has been extensively employed. This study focuses on the mechanical properties and microstructure of the parent metal, heat-affected zone, and weld zone before and after post-weld heat treatment. The 5 mm thick, butt-welded MS plates are being welded using a unique vibratory technique to impart vibration with a 0–100 Hz frequency to the workpiece during shielded metal arc welding. An annealing process carries out the post-heat treatment of welded joints. The optical microscope is primarily used to investigate the microstructure of mild steel to describe the size and form of grains. The results showed that the microhardness of welded joints is increased in the heat-affected zone and welded joint by post-weld heat treatment. Tensile strength and impact strength of welded joints have increased by PWHT. PWHT at 650 °C resulted in a considerable decrease in weld zone ductility and a rise in tensile strength. The refined microstructure of welded joints is observed due to the PWHT of low-frequency vibration-assisted welded joints at a low heat input of 80 Amp. SEM and XRD analysis have also been used to investigate the microstructure of weld MS plates. The microstructure is discovered to be uniform and free from the dendritic pattern; the material becomes more ductile after annealing, and the material’s tensile strength becomes uniform everywhere except for HAZ.
Investigation of post weld heat treatment on mechanical properties of low frequency vibration assisted SMAW mild steel welded joints
In applications involving high temperatures, welded mild steel has been extensively employed. This study focuses on the mechanical properties and microstructure of the parent metal, heat-affected zone, and weld zone before and after post-weld heat treatment. The 5 mm thick, butt-welded MS plates are being welded using a unique vibratory technique to impart vibration with a 0–100 Hz frequency to the workpiece during shielded metal arc welding. An annealing process carries out the post-heat treatment of welded joints. The optical microscope is primarily used to investigate the microstructure of mild steel to describe the size and form of grains. The results showed that the microhardness of welded joints is increased in the heat-affected zone and welded joint by post-weld heat treatment. Tensile strength and impact strength of welded joints have increased by PWHT. PWHT at 650 °C resulted in a considerable decrease in weld zone ductility and a rise in tensile strength. The refined microstructure of welded joints is observed due to the PWHT of low-frequency vibration-assisted welded joints at a low heat input of 80 Amp. SEM and XRD analysis have also been used to investigate the microstructure of weld MS plates. The microstructure is discovered to be uniform and free from the dendritic pattern; the material becomes more ductile after annealing, and the material’s tensile strength becomes uniform everywhere except for HAZ.
Investigation of post weld heat treatment on mechanical properties of low frequency vibration assisted SMAW mild steel welded joints
Int J Interact Des Manuf
Ranjan, Rajeev (author) / Jha, Sanjay Kumar (author) / Mouria, Pradeep Kumar (author) / Mishra, Subhash (author)
2024-10-01
12 pages
Article (Journal)
Electronic Resource
English
Mechanical properties of 304L stainless steel SMAW joints under dynamic impact loading
| British Library Online Contents | 2005
| British Library Online Contents | 2006