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Welding Aluminum Magnesium Alloy. Expansion especially in ground and air transportations where large-size complex. Magnesium alloys that have a zinc content of 5-6 are crack sensitive and dont weld nearly as good as the ones that have about 10 aluminum content along with lower zinc.
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ER5356 commonly referred to as ALMg-5 is a 5 Magnesium Aluminum Alloy filler metal that is used to weld Aluminum Alloys 5050 5052 5083 5356 5454 and 5456. Seriously there is just not that much magnesium welded in the world compared to aluminum and steel which comprise fully 90 percent of all welding. Magnesium 05 to 30 percent in an aluminum weld produces a crack-sensitive weld metal composition.
The alloying elements are mainly found in the 1xxx 3xxx and 5xxx series of alloys.
Intermetallic compounds IMCs formed in the stir zone SZ of dissimilar friction stir welded aluminummagnesium AlMg joint always deteriorate tensile properties. Depending on the mix some alloys are more prone to cracking and other problems. The cracking of aluminum-magnesium alloy welds decreases as the magnesium content of the weld increases above 2. Applications requiring superior weld quality.
