Development of Laser-based Directed Energy Deposition System with Non-Pneumatic Powder Feedstock Handling and Synthesis of Toolpath Strategies

Simple item page
dc.contributor.authorSingh, Ambrish
dc.date.accessioned2025-03-11T05:31:24Z
dc.date.available2025-03-11T05:31:24Z
dc.date.issued2024
dc.descriptionSupervisors: Kapil, Sajan and Das, Manas
dc.description.abstractPneumatic methods of powder feedstock handling are prevalent in laser-based Directed Energy Deposition (DED). These methods use inert gases (mostly Argon) to meter, convey, and inject powder feedstock into the melt pool created by the laser on the substrate. Although several variants of pneumatic feedstock handling exist in the literature, the difference is mainly in the mechanism of powder metering and the geometric design of the powder delivery nozzle. This work identifies several shortcomings of such pneumatic-based feedstock handling systems and offers an easy solution that could be more economical. A gravity-based system, proposed as part of this study, has been demonstrated to be a viable replacement for pneumatic methods. The gravity-based non-pneumatic system utilizes a helical-grooved shaft rotating inside a powder-filled hopper to meter the mass flow rate. This metered influx of powder is subsequently delivered to the powder delivery nozzle, which creates a conical and convergent envelope of powder stream around the fusion source before finally injecting it into the melt pool.
dc.identifier.otherROLL NO.176103107
dc.identifier.urihttps://gyan.iitg.ac.in/handle/123456789/2816
dc.language.isoen
dc.relation.ispartofseriesTH-3284
dc.titleDevelopment of Laser-based Directed Energy Deposition System with Non-Pneumatic Powder Feedstock Handling and Synthesis of Toolpath Strategies
dc.typeThesis
Files
Original bundle
Now showing 1 - 2 of 2
No Thumbnail Available
Name:
Abstract-TH-3284_176103107.pdf
Size:
112.34 KB
Format:
Adobe Portable Document Format
Description:
ABSTRACT
Download
No Thumbnail Available
Name:
TH-3284_176103107.pdf
Size:
23.54 MB
Format:
Adobe Portable Document Format
Description:
THESIS
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed to upon submission
Description:
Download
Collections
PhD Theses (Mechanical Engineering)