An Nd:YAG laser was used for surface alloying of aluminum AA1200. The alloying powder was a mixture of Ni and SiC in different ratios. A study of the microstructures obtained after alloying was conducted using optical and scanning electron microscopy. Energy-dispersive X-ray (EDX) and X-ray diffraction (XRD) were used for phase identification. Analysis of the alloyed layer revealed the presence of Al4C3, AlNi3, and -Al-Si eutectic phases. The SiC particles dissociated into Si and C. The dissociated C reacted with Al to form Al4C3. The addition of Ni resulted in the formation of the Al3Ni phase. A hardness increase of approximately four times that of aluminum AA1200 was achieved in the alloyed layer.
Reference:
Mabhali, L.A.B., Pityana, S.l. and Sacks, N. 2010. Laser surface alloying of aluminum (AA1200) with Ni and SiC Powders. Materials and Manufacturing Processes, Vol. 25(12), pp 1397 - 1403
Mabhali, L. A., Pityana, S. L., & Sacks, N. (2010). Laser surface alloying of aluminum (AA1200) with Ni and SiC Powders. http://hdl.handle.net/10204/4791
Mabhali, Luyolo AB, Sisa L Pityana, and N Sacks "Laser surface alloying of aluminum (AA1200) with Ni and SiC Powders." (2010) http://hdl.handle.net/10204/4791
Mabhali LA, Pityana SL, Sacks N. Laser surface alloying of aluminum (AA1200) with Ni and SiC Powders. 2010; http://hdl.handle.net/10204/4791.
Copyright: 2010 Taylor and Francis. This is the author's pre print version. The definitive version is published in Materials and Manufacturing Processes, Vol. 25(12), pp 1397 - 1403
