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

G. A. Ravi; Chunlei Qiu; Moataz M. Attallah

doi:10.1016/j.matlet.2016.05.038

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

G. A. Ravi, Chunlei Qiu^*, Moataz M. Attallah

^*Corresponding author for this work

Metallurgy and Materials

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

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 CW+PW (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 CW+PW mode tends to give rise to much finer equiaxed grains. Higher laser power was found to result in larger grains and coarser microstructure.

Original language	English
Pages (from-to)	104-108
Number of pages	5
Journal	Materials Letters
Volume	179
Early online date	12 May 2016
DOIs	https://doi.org/10.1016/j.matlet.2016.05.038
Publication status	Published - 15 Sept 2016

Keywords

Direct Laser Deposition
Laser Mode
Microstructure
Ti-6Al-4V

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanical Engineering
Mechanics of Materials

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

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 CW+PW (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 CW+PW mode tends to give rise to much finer equiaxed grains. Higher laser power was found to result in larger grains and coarser microstructure.",

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AU - Ravi, G. A.

AU - Qiu, Chunlei

AU - Attallah, Moataz M.

PY - 2016/9/15

Y1 - 2016/9/15

N2 - 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 CW+PW (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 CW+PW mode tends to give rise to much finer equiaxed grains. Higher laser power was found to result in larger grains and coarser microstructure.

AB - 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 CW+PW (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 CW+PW mode tends to give rise to much finer equiaxed grains. Higher laser power was found to result in larger grains and coarser microstructure.

KW - Direct Laser Deposition

KW - Laser Mode

KW - Microstructure

KW - Ti-6Al-4V

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SN - 0167-577X

VL - 179

SP - 104

EP - 108

JO - Materials Letters

JF - Materials Letters

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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