Bishal Silwal- Georgia Southern University
Bishal Silwal
- Georgia Southern University
About
7
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Introduction
Bishal Silwal currently works at the Department of Mechanical Engineering., Georgia Southern University. Bishal does research in Welding and Joining, metal additive manufacturing
Current institution
Publications
Publications (7)
Metal Big Area Additive Manufacturing (mBAAM) offers the potential to fabricate large scale tools at high deposition rates (15 lb/h +). 410 martensitic steel is a potential tooling material, owing to its low cost, good machinability and reasonable printability. During the mBAAM process, the shielding gas can have a significant impact on the materia...
Wire arc additive manufacturing (AM) is the process by which a large, metallic structure is built layer-by-layer using a welding arc to melt a wire feedstock. A novel opportunity exists to alter the shielding gas composition to fabricate distinct geometrical features without altering the other AM parameters. In the following study, shielding gases...
Gas tungsten arc (GTA) cladding has been widely applied in surface modification and repairing. In this study, low current gas tungsten arc welding (GTAW) cladding in the range of 60 to 100 A was performed with resistively heating hot-wire filler Inconel alloy (IN625) on the 347 stainless steel substrate. A 70 A or more primary current can be used t...
Government and societal interests in additive manufacturing have increased scrutiny on process analysis, cross-cutting sustainability, and integrated decision-making methods to address commercialization and sustainability challenges. One of the key challenges is the absence of standardized metrics to assess design parameters and manufacturing pract...
Bead-on-plate experiments were carried out, and the weld-bead size and shape were compared and discussed. The welding droplet parameters were measured by a high-speed camera. A computation fluid dynamics (CFD) model utilizing VOF (volume of fluid) method, incorporating the experimental droplet parameters has been developed to understand the weld po...
Cross-weld creep testing conducted at 650 °C under 69 MPa stress has reproduced either the Type I or Type IV failure mode in Grade 91 welds, depending on the post-weld heat treatment procedures. Welds post-weld heat treated below the AC1 temperature have ruptured in the Type VI failure mode, while welds heat-treated above the AC1 temperature of the...
The impact toughness of the heat-affected zone (HAZ) for Grade 91 steel welds has been experimentally investigated. The as-welded multipass HAZ has a significant scatter in toughness, due to variations in the Charpy notch location and the path of fracture propagation. The cross-weld Charpy specimen gives a toughness value that can be attributed to...
