Effect of Laser Powder Bed Fusion Parameters on the Microstructure and Texture Development in Superelastic Ti–18Zr–14Nb Alloy

The effect of different laser powder bed fusion (L-PBF) parameters on the phase composition, microstructure, and crystallographic texture of Ti–18Zr–14Nb alloy was studied. Two levels of laser power, scanning speed, and hatching space were used, while the layer thickness was kept constant. The resul...

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Bibliographic Details
Published in:Shape memory and superelasticity : advances in science and technology 2017-12, Vol.3 (4), p.361-372
Main Authors: Kreitcberg, A., Brailovski, V., Sheremetyev, V., Prokoshkin, S.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Crystallography
Electron microscopy
Flux density
Invited Paper
Lasers
Materials Science
Metal fatigue
Microstructure
Phase composition
Rapid prototyping
Special Issue: A Tribute to Prof. Shuichi Miyazaki–From Fundamentals to Applications
Superelasticity
Texture
Thickness
Titanium base alloys
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Summary:The effect of different laser powder bed fusion (L-PBF) parameters on the phase composition, microstructure, and crystallographic texture of Ti–18Zr–14Nb alloy was studied. Two levels of laser power, scanning speed, and hatching space were used, while the layer thickness was kept constant. The resulting volume energy density was ranged from 20 to 60 J/mm 3 , and the build rate, from 12 to 36 cm 3 /h. The manufactured coupons were analyzed by X-ray diffractometry, transmission, and scanning electron microscopy. It was found that the greater influence observed on the microstructure and texture development was caused by the value of laser power, while the lowest, by that of hatching space. Based on the results obtained, the processing optimization strategy aimed at improving the density, superelastic, and fatigue properties of the L-PBF manufactured Ti–18Zr–14Nb alloy was proposed.
ISSN:2199-384X
2199-3858
DOI:10.1007/s40830-017-0125-0