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Questions and Answers
What is the result of using Al–Li–Cu alloys in the fuselage frames of the F16?
What is the result of using Al–Li–Cu alloys in the fuselage frames of the F16?
- A 50% reduction in fatigue life and a 10% increase in weight
- No change in fatigue life and a 20% reduction in weight
- A two-fold increase in fatigue life and weight
- A three-fold increase in fatigue life and a 5% reduction in weight (correct)
What is the purpose of the heat-treatment process in age-hardenable aluminum alloys?
What is the purpose of the heat-treatment process in age-hardenable aluminum alloys?
- To increase the hardness of the alloy
- To decrease the Young’s modulus of the alloy
- To reduce the weight of the alloy
- To achieve the high mechanical properties required for aero structures (correct)
What is the sequence of operations in the heat-treatment process?
What is the sequence of operations in the heat-treatment process?
- Quenching, artificial ageing, solution treatment
- Quenching, solution treatment, artificial ageing
- Solution treatment, quenching, artificial ageing (correct)
- Artificial ageing, solution treatment, quenching
Which of the following properties is not improved by the heat-treatment process?
Which of the following properties is not improved by the heat-treatment process?
What is the purpose of solution treatment in the heat-treatment process?
What is the purpose of solution treatment in the heat-treatment process?
Which alloy is used in the fuselage and lift frame of the EH 101 helicopter?
Which alloy is used in the fuselage and lift frame of the EH 101 helicopter?
What is the primary purpose of annealing a material?
What is the primary purpose of annealing a material?
What is the main reason why non-age-hardenable alloys are limited in their use in aircraft structures?
What is the main reason why non-age-hardenable alloys are limited in their use in aircraft structures?
What determines the strength of non-age-hardenable alloys?
What determines the strength of non-age-hardenable alloys?
What is the typical proof strength of most tempered non-age-hardenable alloys?
What is the typical proof strength of most tempered non-age-hardenable alloys?
What is the purpose of temper designation systems in aluminium alloys?
What is the purpose of temper designation systems in aluminium alloys?
Which alloys cannot be age-hardened via heat-treatment processing?
Which alloys cannot be age-hardened via heat-treatment processing?
What is the primary purpose of age-hardening aluminum alloys?
What is the primary purpose of age-hardening aluminum alloys?
Which aluminum alloy series is characterized by high strength, fatigue resistance, and toughness?
Which aluminum alloy series is characterized by high strength, fatigue resistance, and toughness?
What is the primary alloying element in the 2000 series aluminum alloys?
What is the primary alloying element in the 2000 series aluminum alloys?
Which of the following alloys is used in aircraft fuel tanks, fairings, oil tanks, and wing tips?
Which of the following alloys is used in aircraft fuel tanks, fairings, oil tanks, and wing tips?
What is the primary application of the 4000 series aluminum alloys?
What is the primary application of the 4000 series aluminum alloys?
What is the composition of the alloy 5052 Al?
What is the composition of the alloy 5052 Al?
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