Microstructure characterisation of hypereutectoid aluminium bronze composite coating

Kucita, P, Wang, S.C., Li, W.S., Cook, R.B. and Starink, M.J. (2015) Microstructure characterisation of hypereutectoid aluminium bronze composite coating. Journal of Physics: Conference Series, 644, 12010. (doi:10.1088/1742-6596/644/1/012010).

Abstract

Hypereutectoid aluminium bronze coating was deposited onto an E.N. 10503 steel using plasma transferred arc welding (PTA). Microstructure characterisation of the coating and a section near the steel substrate joint was carried out using SEM, EBSD, EDS in conjunction with XRD and depth-sensing nano-indentation. The constituent phases in the coating were identified as: martensitic Cu3Al ?1' phase, solid solution of Al in Cu ? phase and the intermetallic Fe3Al ?1 phase. The region near the steel substrate was characterised by high hardness, large grains and presence of Cu precipitates. No cracks were observed in this region. The coating has high hardness of 4.9GPa and Young’s modulus of 121.7GPa. This is attributed to homogeneous distribution of sub microns size Fe3Al intermetallic phase. The implications of the coating to the engineering application of sheet metal forming are discussed

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Contributors

Author: R.B. Cook

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