Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10226
Title: Laser surface alloying of NiCrSiB on Al6061 aluminium alloy
Authors: Man, HC 
Zhang, S
Yue, TM 
Cheng, FT
Keywords: Aluminium alloy
Cavitation erosion
Laser surface-alloying
NiCrSiB
Issue Date: 2001
Publisher: Elsevier
Source: Surface and coatings technology, 2001, v. 148, no. 2-3, p. 136-142 How to cite?
Journal: Surface and coatings technology 
Abstract: NiCrSiB powder was mixed with a binding agent and then painted onto the roughened surface of Al6061 for laser surface alloying using a high-power Nd-YAG laser. With optimum process parameters, NiCrSiB can be successfully alloyed onto the aluminium alloy surface with good metallurgical bonding between the alloyed layer and the substrate. A porosity- and crack-free surface was achieved by overlapping single tracks. The surface consists of a fine dendritic structure of intermetallic compounds of Ni-Al. A surface hardness of 900 Hv was noted. Uneven distribution of Ni content along the depth of the alloyed surface was observed. The laser-alloyed surface has improved corrosion and protection potentials and the same pitting potential as compared with those of the AI6061. In the vibratory cavitation erosion test in 3.5%NaCl, the weight loss of the specimen with a NiCrSiB alloyed surface was half of that of the A16061.
URI: http://hdl.handle.net/10397/10226
ISSN: 0257-8972
EISSN: 1879-3347
DOI: 10.1016/S0257-8972(01)01339-1
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