Please use this identifier to cite or link to this item: http://localhost:8081/xmlui/handle/123456789/10541
Title: EVALUATION AND CHARACTERIZATION OF HIGH PERFORMANCE SURFACES FABRICATED BY LRM
Authors: Jhavar, Suyog
Keywords: MECHANICAL INDUSTRIAL ENGINEERING;HIGH PERFORMANCE SURFACES FABRICATED;LRM;LASER RAPID MANUFACTURING
Issue Date: 2010
Abstract: Laser rapid manufacturing (LRM) has time-honored attention due to its unique features and capabilities in various sectors of industries involved in metallic coating, high value components repair, prototyping and low volume manufacturing. This material processing technique is an interdisciplinary technology utilizing knowledge of laser, computer aided design and manufacturing, robotics, sensor controls, powder metallurgy and fundamentals of rapid solidification. This thesis presents work under two different areas of LRM, first is about process modification and the other is to characterize SS316L surface prepared by LRM. The first is customization of CAM software, such as it will be portable, interoperable and adaptable. This customization can avoid transformation of CAD model into STL file format and provide direct control of the process using automatically modified CAM program. This novel approach will be beneficial in controlling the software and capable of managing modular machines dynamically with minimal manual intervention. The codes containing LRM program are easy to understand and can be modify at any level during production. The process has sufficient capability to fulfill production demands. It can also save higher cost of purchasing slicing software. Secondly, this thesis emphasized over the effect of governing parameters like scanning speed and laser power over microstructure of the clad surface which leads to control the mechanical properties of the same. Here SS316L has been taken in powder form which is deposited over substrate of same material. A three dimensional heat transfer model with moving heat source has been made using standard COMSOL software. This program has been utilized such that the melt pool geometry and various solidification parameters were calculated. The calculated melt pool geometry were in good agreement with the once obtained through experiments. The solidification parameters G and G/R were determined. Efforts have been made to correlate these results at different scanning speed with micro-structural changes in the actual samples.
URI: http://hdl.handle.net/123456789/10541
Other Identifiers: M.Tech
Research Supervisor/ Guide: Arora, Navneet
Paul, C. P.
metadata.dc.type: M.Tech Dessertation
Appears in Collections:MASTERS' THESES (MIED)

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