Microstructure evolution in Ti6Al4V alloy laser cladded with Premix Ti+TiB2 powders

M. O.H. Amuda; E. T. Akinlabi; M. Moolla

doi:10.1016/j.matpr.2017.01.084

Microstructure evolution in Ti6Al4V alloy laser cladded with Premix Ti+TiB₂ powders

M. O.H. Amuda, E. T. Akinlabi, M. Moolla

Mechanical Engineering Science

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

10 Citations (Scopus)

Abstract

Microstructure evolution in relation to the geometrical properties of Ti6Al4V treated with laser deposited premix Ti/TiB₂ powders is presented. The microstructural characterisation is reinforced with X-ray diffractometry and scanning electron microscopy to identify the predominant phases responsible for the change inmicrohardness values of the cladded alloy. Geometrical analysis indicates that the aspect ratio is outside the range specified for the production of defect free claddings while the degree of dilution of XYZ ensured a thin interfacial layer which assists in avoiding crack in the cladded layer. A maximum microhardness value of WXY is achieved in the cladded layer which is about five folds greater than that of the substrate; and this is attributed to the presence of hard undissolved TiB₂ particles in the cladded alloy.

Original language	English
Pages (from-to)	763-773
Number of pages	11
Journal	Materials Today: Proceedings
Volume	4
Issue number	2
DOIs	https://doi.org/10.1016/j.matpr.2017.01.084
Publication status	Published - 2017

Keywords

Aspect ratio
bead geometry
dilution
microhardness
microstructure evolution
pre-mix powders
scan speed

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1016/j.matpr.2017.01.084

Cite this

@article{65484df4ec7b45f6aafdefee9cf873de,

title = "Microstructure evolution in Ti6Al4V alloy laser cladded with Premix Ti+TiB2 powders",

abstract = "Microstructure evolution in relation to the geometrical properties of Ti6Al4V treated with laser deposited premix Ti/TiB2 powders is presented. The microstructural characterisation is reinforced with X-ray diffractometry and scanning electron microscopy to identify the predominant phases responsible for the change inmicrohardness values of the cladded alloy. Geometrical analysis indicates that the aspect ratio is outside the range specified for the production of defect free claddings while the degree of dilution of XYZ ensured a thin interfacial layer which assists in avoiding crack in the cladded layer. A maximum microhardness value of WXY is achieved in the cladded layer which is about five folds greater than that of the substrate; and this is attributed to the presence of hard undissolved TiB2 particles in the cladded alloy.",

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AU - Amuda, M. O.H.

AU - Akinlabi, E. T.

AU - Moolla, M.

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N2 - Microstructure evolution in relation to the geometrical properties of Ti6Al4V treated with laser deposited premix Ti/TiB2 powders is presented. The microstructural characterisation is reinforced with X-ray diffractometry and scanning electron microscopy to identify the predominant phases responsible for the change inmicrohardness values of the cladded alloy. Geometrical analysis indicates that the aspect ratio is outside the range specified for the production of defect free claddings while the degree of dilution of XYZ ensured a thin interfacial layer which assists in avoiding crack in the cladded layer. A maximum microhardness value of WXY is achieved in the cladded layer which is about five folds greater than that of the substrate; and this is attributed to the presence of hard undissolved TiB2 particles in the cladded alloy.

AB - Microstructure evolution in relation to the geometrical properties of Ti6Al4V treated with laser deposited premix Ti/TiB2 powders is presented. The microstructural characterisation is reinforced with X-ray diffractometry and scanning electron microscopy to identify the predominant phases responsible for the change inmicrohardness values of the cladded alloy. Geometrical analysis indicates that the aspect ratio is outside the range specified for the production of defect free claddings while the degree of dilution of XYZ ensured a thin interfacial layer which assists in avoiding crack in the cladded layer. A maximum microhardness value of WXY is achieved in the cladded layer which is about five folds greater than that of the substrate; and this is attributed to the presence of hard undissolved TiB2 particles in the cladded alloy.

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