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Effects of grain refinement on the tensile properties and precipitation kinetics of Al-Si-Mg alloys cast in sand molds by co-alloying of La–B elements were investigated in this work. The kinetics… Click to show full abstract
Effects of grain refinement on the tensile properties and precipitation kinetics of Al-Si-Mg alloys cast in sand molds by co-alloying of La–B elements were investigated in this work. The kinetics of precipitation after refinement were investigated, including the changes of the precipitation mechanism and decrease of the precipitation activation energy. The reduction of the Avrami exponent indicates the major precipitation mechanism transforms in A359 alloys. Meanwhile, a modified aging process is obtained, which considerably promotes the mechanical properties.
Journal Title: Metallurgical and Materials Transactions B
Year Published: 2020
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