Microstructure characterization of hypereutectoid aluminium bronze composite coating

Electron Microscopy and Analysis Group Conference 2015

Kucita, P.^1 ; Wang, S.C.^1 ; Li, W.S.^2 ; Cook, R.B.^1 ; Starink, M.J.^3

National Centre for Advanced Tribology at Southampton (NCATS), Faculty of Engineering and the Environment, University of Southampton, University Road, Southampton

SO17 1BJ, United Kingdom^1

State Key Laboratory for Advanced Non-ferrous Materials, Lanzhou University of Technology, China^2

Engineering Materials, Faculty of Engineering and the Environment, University of Southampton, University Road, Southampton

SO17 1BJ, United Kingdom^3

关键词: Constituent phasis;    Cu precipitates;    Engineering applications;    Homogeneous distribution;    Intermetallic phase;    Microstructure characterisation;    Microstructure characterization;    Plasma transferred arc welding;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/644/1/012010/pdf
DOI  :  10.1088/1742-6596/644/1/012010

来源: IOP

【 摘 要 】

Hypereutectoid aluminium bronze coating was deposited onto an E.N. 10503 steel substrate 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 β1' phase, solid solution of Al in Cu α phase and the intermetallic Fe3Al κ1phase. 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.