Abstract
The industry, as well as the Scientist, focused their attention on the development of the promising magnesium alloys, due to the increasing demand for lightweight materials in aerospace and automobile applications. However, an important tendency to oxidation make magnesium alloys requiring surface treatments. A series of experiments was carried out in order to improve the corrosion resistance of two types of magnesium alloys, WE43 and ZE41. In most cases, the substrate surface was treated before laser interaction. Side injection of AS12 powder under a 3 kW cw Nd:YAG laser was employed. The deposited layers present very good bond properties. The resulting microstructure was analyzed and some mechanical properties determined, such as hardness, which is increased due to the Al3Mg2, Al12Mg17 and Mg2Si intermetallic formation. The results obtained represent an important step to achieve an enhanced corrosion resistance for magnesium alloys.The industry, as well as the Scientist, focused their attention on the development of the promising magnesium alloys, due to the increasing demand for lightweight materials in aerospace and automobile applications. However, an important tendency to oxidation make magnesium alloys requiring surface treatments. A series of experiments was carried out in order to improve the corrosion resistance of two types of magnesium alloys, WE43 and ZE41. In most cases, the substrate surface was treated before laser interaction. Side injection of AS12 powder under a 3 kW cw Nd:YAG laser was employed. The deposited layers present very good bond properties. The resulting microstructure was analyzed and some mechanical properties determined, such as hardness, which is increased due to the Al3Mg2, Al12Mg17 and Mg2Si intermetallic formation. The results obtained represent an important step to achieve an enhanced corrosion resistance for magnesium alloys.
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