Laser Surface Alloying Low Carbon Steel Using Chromium and Nickel Powder Feed: Mechanisms, Microstructures, Properties and Models (Corrosion, Conduction, Mass Transfer)

The process of laser surface alloying was studied. The principal objectives were to use elemental powders or their mechanical mixtures to make surface alloys, evaluate alloy microstructure and properties, and develop mathematical models to interpret the observed results. A new powder feeding system was used to alloy AISI 1016 steel surfaces with chromium and chromium plus nickel. Samples were examined microstructurally, and their corrosion resistance and surface roughness were measured. A variable-property heat conduction model was developed to study process responses to changing processing conditions and material properties. A two-dimensional, transient, numerical model for mass transfer was used to simulate the process of alloy generation.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Metallurgical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Chande, Tushar Shashikant

• Engineering, Metallurgy

Identifier

(UMI)AAI8502096

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/71813