Effect of CO 2 Laser-Sustained Nitrogen Plasma on Heat and Mass Transfer During Laser-Nitriding of Commercially-Pure Titanium

Amar M. Kamat, Stephen M. Copley, Judith A. Todd

OnderzoeksoutputAcademicpeer review

Samenvatting

A free‐standing nitrogen plasma can be struck and sustained in open atmosphere using a 5 kW CO2 laser and a coaxial nitrogen flow. In this research, we investigate the effect of performing titanium nitriding in the presence of a laser‐sustained plasma (LSP) on the nitrided surface layer. Experiments are conducted with and without the LSP at three different processing conditions to deposit single trails of TiN on commercially pure titanium substrates. Scanning electron microscopy, optical profilometry, optical metallography, and weight measurements are performed to study the nitrided surface layer. Temperature measurements are done to study the energy transfer between the LSP and the substrate. It is found that the LSP widens the nitride layer, reduces surface oxidation, increases nitrogen intake into the melt pool, and acts as a line source of energy. These results will be used to form wide‐area TiN layers on cylindrical specimens.

Originele taal-2English
TitelProceedings of the 13th World Conference on Titanium
UitgeverijWiley
Hoofdstuk153
Pagina's893-898
Aantal pagina's6
ISBN van elektronische versie9781119296126
ISBN van geprinte versie9781119283263
DOI's
StatusPublished - 7-mei-2016
Extern gepubliceerdJa

Publicatie series

NaamProceedings of the 13th World Conference on Titanium

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