Phase evolution and dendrite growth in laser cladding of aluminium on zirconium

Tai Man Yue; H. Xie; X. Lin; H. O. Yang

doi:10.1016/j.jallcom.2010.12.173

Phase evolution and dendrite growth in laser cladding of aluminium on zirconium

Tai Man Yue, H. Xie, X. Lin, H. O. Yang

Research output: Journal article publication › Journal article › Academic research › peer-review

10 Citations (Scopus)

Abstract

Aluminium was laser clad on a pure zirconium substrate using the blown powder method. The microstructure across the laser-clad coating was studied. Starting from the bottom to the top surface of the coating, a series of phase evolutions had occurred: (Zr) → (Zr) + AlZr2+ AlZr3→ Al4Zr5+ Al3Zr2→ Al3Zr2+ AlZr2→ Al2Zr → Al2Zr + Al3Zr. This resulted in an epitaxial columnar crystal growth at the re-melt substrate boundary, a band of backward growth Al3Zr2dendrites towards the lower half of the coating, and a two-phase eutectic dendritic growth of Al2Zr + Al3Zr towards the top of the coating. The evolution of the various phases and microstructures is discussed in conjunction with the Al-Zr phase diagram, the criteria for planar interface instability, and the theory of eutectic growth under rapid solidification conditions (the TMK model).

Original language	English
Pages (from-to)	3705-3710
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	509
Issue number	8
DOIs	https://doi.org/10.1016/j.jallcom.2010.12.173
Publication status	Published - 24 Feb 2011

Keywords

Aluminium
Dendrite growth
Intermetallics
Laser cladding
Phase evolution
Zirconium

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2010.12.173

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title = "Phase evolution and dendrite growth in laser cladding of aluminium on zirconium",

abstract = "Aluminium was laser clad on a pure zirconium substrate using the blown powder method. The microstructure across the laser-clad coating was studied. Starting from the bottom to the top surface of the coating, a series of phase evolutions had occurred: (Zr) → (Zr) + AlZr2+ AlZr3→ Al4Zr5+ Al3Zr2→ Al3Zr2+ AlZr2→ Al2Zr → Al2Zr + Al3Zr. This resulted in an epitaxial columnar crystal growth at the re-melt substrate boundary, a band of backward growth Al3Zr2dendrites towards the lower half of the coating, and a two-phase eutectic dendritic growth of Al2Zr + Al3Zr towards the top of the coating. The evolution of the various phases and microstructures is discussed in conjunction with the Al-Zr phase diagram, the criteria for planar interface instability, and the theory of eutectic growth under rapid solidification conditions (the TMK model).",

keywords = "Aluminium, Dendrite growth, Intermetallics, Laser cladding, Phase evolution, Zirconium",

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T1 - Phase evolution and dendrite growth in laser cladding of aluminium on zirconium

AU - Yue, Tai Man

AU - Xie, H.

AU - Lin, X.

AU - Yang, H. O.

PY - 2011/2/24

Y1 - 2011/2/24

N2 - Aluminium was laser clad on a pure zirconium substrate using the blown powder method. The microstructure across the laser-clad coating was studied. Starting from the bottom to the top surface of the coating, a series of phase evolutions had occurred: (Zr) → (Zr) + AlZr2+ AlZr3→ Al4Zr5+ Al3Zr2→ Al3Zr2+ AlZr2→ Al2Zr → Al2Zr + Al3Zr. This resulted in an epitaxial columnar crystal growth at the re-melt substrate boundary, a band of backward growth Al3Zr2dendrites towards the lower half of the coating, and a two-phase eutectic dendritic growth of Al2Zr + Al3Zr towards the top of the coating. The evolution of the various phases and microstructures is discussed in conjunction with the Al-Zr phase diagram, the criteria for planar interface instability, and the theory of eutectic growth under rapid solidification conditions (the TMK model).

AB - Aluminium was laser clad on a pure zirconium substrate using the blown powder method. The microstructure across the laser-clad coating was studied. Starting from the bottom to the top surface of the coating, a series of phase evolutions had occurred: (Zr) → (Zr) + AlZr2+ AlZr3→ Al4Zr5+ Al3Zr2→ Al3Zr2+ AlZr2→ Al2Zr → Al2Zr + Al3Zr. This resulted in an epitaxial columnar crystal growth at the re-melt substrate boundary, a band of backward growth Al3Zr2dendrites towards the lower half of the coating, and a two-phase eutectic dendritic growth of Al2Zr + Al3Zr towards the top of the coating. The evolution of the various phases and microstructures is discussed in conjunction with the Al-Zr phase diagram, the criteria for planar interface instability, and the theory of eutectic growth under rapid solidification conditions (the TMK model).

KW - Aluminium

KW - Dendrite growth

KW - Intermetallics

KW - Laser cladding

KW - Phase evolution

KW - Zirconium

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DO - 10.1016/j.jallcom.2010.12.173

M3 - Journal article

SN - 0925-8388

VL - 509

SP - 3705

EP - 3710

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 8

ER -

Phase evolution and dendrite growth in laser cladding of aluminium on zirconium

Abstract

Keywords

ASJC Scopus subject areas

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