Abstract
The microstructure and mechanical properties of Mg-8Al-1Zn-3Ca magnesium alloy aged for different time are investigated. With the increase of aging time, the high melting point intermetallic compounds Al2Ca and Al4Ca are increased obviously in number and the phase of Mg17Al12 has a dramatic decrease in number. The longer aging time results in a significant segregation phenomenon. The second phase becomes coarsen, and mechanical properties decline.
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