What is the primary purpose of precipitation heat treatment in aluminum alloys?

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Multiple Choice

What is the primary purpose of precipitation heat treatment in aluminum alloys?

Explanation:
Precipitation heat treatment strengthens aluminum by forming finely dispersed precipitates that impede dislocation motion, which increases hardness and strength. After a solution heat treatment and quench to create a supersaturated solid solution, aging allows small precipitates to form. These precipitates interact with moving dislocations, making plastic deformation harder and boosting yield and tensile strength. Ductility may decrease somewhat, but corrosion resistance and weight are not the primary targets of this process.

Precipitation heat treatment strengthens aluminum by forming finely dispersed precipitates that impede dislocation motion, which increases hardness and strength. After a solution heat treatment and quench to create a supersaturated solid solution, aging allows small precipitates to form. These precipitates interact with moving dislocations, making plastic deformation harder and boosting yield and tensile strength. Ductility may decrease somewhat, but corrosion resistance and weight are not the primary targets of this process.

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