Aluminum Alloys and Heat Treatment

These flashcards cover essential concepts related to aluminum alloys, heat treatment processes, and relevant properties to aid in exam preparation.

What does the letter 'F' represent in basic temper designations for aluminum alloys?

As fabricated - applies to products of a forming process without special thermal control.

What is the significance of the 'H' designation in aluminum alloys?

Strain Hardened - indicates products strengthened through cold-working followed by thermal treatment.

What temperature range is typically used for Solution Heat Treatment?

430-540°C.

What is the main purpose of heat treatment in metals?

To make the metal more useful, serviceable, and safe by altering its mechanical properties.

What percentage of the thickness is the aluminum coating in Alclad aluminum?

Approximately 5% of the alloy's thickness.

What is the purpose of annealing in the treatment of aluminum alloys?

To soften the metal and decrease internal stress.

Which aluminum alloy is known for high strength and used in structures for fuel tanks?

Alloy 5052.

What distinguishes heat-treatable from non-heat-treatable aluminum alloys?

Heat-treatable alloys can gain strength from heat treatment, while non-heat-treatable alloys do not.

What happens to a metal's properties during strain hardening?

The grain structure is altered, resulting in increased hardness and strength.

What is the primary alloying element for pure aluminum?

There are no alloying materials in pure aluminum, making it non-heat-treatable.

How can a metal's aging process be accelerated after quenching?

By reheating the metal and allowing it to soak for a specified time.

What does the term 'natural aging' refer to in metal treatments?

The process where an alloy cools at room temperature and gains strength over time.

What is the typical weight comparison between magnesium and aluminum?

Magnesium weighs about 2/3 as much as aluminum.

What is the primary use of copper in aircraft?

Due to its excellent electrical conductivity, copper is primarily used for electrical wiring.

What is Beryllium copper known for?

It achieves high tensile strength after heat treatment, making it useful for precision applications.

How does titanium combat corrosion, particularly in aerospace applications?

It has excellent corrosion resistance characteristics, especially against salt water.