Precipitation sequence in Al-Mg-Si alloys with excess magnesium

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Toyama Univ, Toyama, Japan [1 ]
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Nippon Kinzoku Gakkaishi | / 8卷 / 718-726期
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Aluminum magnesium silicon alloys - Precipitation sequence - Two step aging;
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摘要：
The precipitation sequence and the behavior of two-step aging in the Al-1.0 mass%Mg2Si-0.4 mass%Mg (excess Mg alloy) was studied by hardness and electrical resistivity measurements, and high resolution transmission electron microscopy (HRTEM). In the excess Mg alloy at the early stage of aging at 473 K, two types of precipitates were observed. Parallelogram-type precipitates appeared near the maximum value of the hardness (HVmax). In the over-aged condition, many β′ phases appeared.
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