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- Title
Enhanced Surface Properties by Electroless Nickel Deposition on a Laser Surface Treated Magnesium Alloy.
- Authors
SUDAGAR, J.; DEWEN, R.; LIAN, J.-S.; ZHENG, B.-J.; VENKATESWARLU, K.
- Abstract
Surface-dependent mechanical and corrosion resistance has been enhanced by electroless nickel (EN) deposition on laser surface treated (LST) AZ91D substrate (AZ91D/LST/EN). This proposed method enhanced the surface properties in a better way than conventional LST on EN deposited AZ91D substrate (AZ91D/EN/LST). Microhardness, dry-sliding wear and electrochemical polarization tests were used to study the hardness, wear and corrosion resistance of these modified surfaces and followed by microstructure, phase composition analysis. The conventional, AZ91D/EN/LST samples produced a relatively smooth, crack-free and hard layer consisting of Ni-Mg intermetallic particles; thereby offered a significant increase in hardness and wear resistance and shortcoming of this method is its significant decrease in corrosion resistance, due to the diffusion of Mg into re-melted layer and the formation of Ni-Mg intermetallic phases. On the other hand, this proposed method AZ91D/LST/EN samples produced an increase in surface hardness and wear resistance and maintains a similar and high corrosion resistance.
- Subjects
MAGNESIUM alloys; NICKEL-plating; METALLIC surfaces; LASERS in engineering; MECHANICAL properties of metals; CORROSION resistance; ELECTROCHEMISTRY
- Publication
Lasers in Engineering (Old City Publishing), 2013, Vol 26, Issue 5/6, p321
- ISSN
0898-1507
- Publication type
Article