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Microstructural control in a Ti-based alloy by changing laser processing mode and power during direct laser deposition

Ravi, G. A., Qiu, Chunlei and Atallah, M. A. 2016. Microstructural control in a Ti-based alloy by changing laser processing mode and power during direct laser deposition. Materials Letters 179 , pp. 104-108. 10.1016/j.matlet.2016.05.038

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Abstract

Ti-6Al-4V samples have been fabricated by direct laser deposition using different laser powers and two different laser processing modes, continuous wave (CW) mode and CWþPW (pulsed wave) mode. The as-fabricated microstructure was investigated using photography, optical microscopy and secondary electron microscopy. It was found that both laser mode and laser power show significant influence on grain structure. The CW mode generally leads to well-developed large columnar grains whereas the CWþPW mode tends to give rise to much finer equiaxed grains. Higher laser power was found to result in larger grains and coarser microstructure.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TN Mining engineering. Metallurgy
T Technology > TS Manufactures
Uncontrolled Keywords: Direct Laser Deposition; Laser Mode; Ti-6Al-4V; Microstructure
Publisher: Elsevier
Date of Acceptance: 7 May 2016
Last Modified: 04 Jun 2017 09:21
URI: http://orca.cf.ac.uk/id/eprint/93734

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