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Microstructures and Properties of Al-Nb Alloys Produced by Laser Surface Treatment

Petrov, P. / Vilar, R. / Almeida, A.

Abstract Aluminium-niobium surface alloys were produced by the blown powder technique using a CW 3 kW CO2 laser. The alloyed layers present porosity that was eliminated by remelting. Their niobium content varied between 48 and 56 wt% and an even distribution of niobium along the depth of the remelted layers was obtained. The material is formed by dendrites of Al3Nb and a small volume fraction of interdendritic α-aluminium solid solution. The Vickers hardness of the niobium-rich layer varies in the range 550-650 HV, depending on the dendritic spacing and on the volume fraction of Al3Nb. The large amount of this intermetallic compound explains the high hardness observed.

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Microstructures and Properties of Al-Nb Alloys Produced by Laser Surface Treatment

Petrov, P. / Vilar, R. / Almeida, A.

Abstract Aluminium-niobium surface alloys were produced by the blown powder technique using a CW 3 kW CO2 laser. The alloyed layers present porosity that was eliminated by remelting. Their niobium content varied between 48 and 56 wt% and an even distribution of niobium along the depth of the remelted layers was obtained. The material is formed by dendrites of Al3Nb and a small volume fraction of interdendritic α-aluminium solid solution. The Vickers hardness of the niobium-rich layer varies in the range 550-650 HV, depending on the dendritic spacing and on the volume fraction of Al3Nb. The large amount of this intermetallic compound explains the high hardness observed.

Microstructures and Properties of Al-Nb Alloys Produced by Laser Surface Treatment

Petrov, P. / Vilar, R. / Almeida, A.

Abstract Aluminium-niobium surface alloys were produced by the blown powder technique using a CW 3 kW CO2 laser. The alloyed layers present porosity that was eliminated by remelting. Their niobium content varied between 48 and 56 wt% and an even distribution of niobium along the depth of the remelted layers was obtained. The material is formed by dendrites of Al3Nb and a small volume fraction of interdendritic α-aluminium solid solution. The Vickers hardness of the niobium-rich layer varies in the range 550-650 HV, depending on the dendritic spacing and on the volume fraction of Al3Nb. The large amount of this intermetallic compound explains the high hardness observed.

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Title:

Microstructures and Properties of Al-Nb Alloys Produced by Laser Surface Treatment

Contributors:

Petrov, P. (author) / Vilar, R. (author) / Almeida, A. (author)

Published in:

Laser Processing: Surface Treatment and Film Deposition ; 565-573

NATO ASI Series ; 307

Publication date:

1996-01-01

Size:

9 pages

ISBN:

978-94-009-0197-1 , 978-94-010-6572-6

ISSN:

DOI:

https://doi.org/10.1007/978-94-009-0197-1_28

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

Physics , Physics, general , Surfaces and Interfaces, Thin Films , Optics, Lasers, Photonics, Optical Devices , Characterization and Evaluation of Materials

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