Aluminium alloys II quiz

Which of the following alloying elements increases the most strength in NON wrought aluminium alloys?

• Zn

• Mg

• Si

• Mn

Which series has lithium as an alloying element?

• 8xxx

• 5xxx

• 7xxx

• 2xxx

Which alloy provides the highest strength of Aluminium alloys?

• Al-Zn-Mg-CU

• Al-Mg-Si

• Al-Fe-Ni

• Al-Li

Which is the most common process used in welding aluminium alloys?

• TIG

• MIG

• Laser Welding

• TIG and MIG

Which of these alloying elements has better EXTRUDABILITY?

• 6xxx

• 7xxx

• 2xxx

• 7xxx and 2xxx

Super Plastic forming is ...

• a property that allows sheet to elongate a decent amount without localized necking

• a property exclusive of aluminium 2004

• able to produce shapes not possible for conventional forming

• allows sheet...

  and

  able to produce...

The corrosion resistance of aluminium alloys is usually an inverse function of the amount of

• Cr (chromium)

• Cu (copper)

• Ni (nickel)

• Mo (molybdenum)

The 2xxx alloys have a superior damage tolerance and good resistance to fatigue crack growth, hence they are mainly used in

• fuselage structure

• wing upper skin

• fuselage stringers

• wing upper stringers

Which is the TRUE statement for aluminium alloys?

• GP zones are incoherent

• Mechanical properties do NOT depend on the aging temperature

• Overheating increases tensile strength

• The higher the aging temperature, the better mechanical properties up to a maximum peak

Which series has excellent corrosion resistance?

• 2xxx

• 6xxx

• 7xxx

• None