Shape Memory Materials

What phase in a shape memory alloy is stable at higher temperatures?

• Martensite

• Austenite

• Ferrite
  

• Cementite

What can cause the shape memory effect in Shape Memory Polymers (SMPs) besides temperature change?

• Humidity

• Magnetic field

• Light

• All of the above

What is the process of heating and cooling a Shape Memory Alloy to define a specific shape known as?

• Forging

• Casting

• Annealing

• Training

What kind of mechanical testing is often used to characterize the shape memory effect?

• Tensile testing

• Hardness testing

• Impact testing

• Fatigue testing

In the context of Shape Memory Alloys, the term 'training' refers to:

• Educating engineers about the properties of the alloy.

• Using heat treatment to make the alloy exhibit the shape memory effect.

• Gradually increasing the strain applied to the alloy during manufacturing.

• The initial process of creating the alloy from its constituent elements.

Which of the following is a popular Shape Memory Alloy in the medical field?

• Nickel-Titanium (Nitinol)

• Aluminum-Zinc

• Copper-Zinc

• Iron-Manganese

What does the Two-Way Shape Memory Effect (TWSME) allow a material to do?

• Change shape in one direction when heated and in the opposite direction when cooled.

• Change shape only when heated.

• Change shape only when a mechanical force is applied.

• Change shape randomly in any direction.

What primarily differentiates a Shape Memory Polymer (SMP) from a Shape Memory Alloy (SMA)?

• SMPs can't exhibit the shape memory effect.

• SMPs are metallic while SMAs are non-metallic.

• SMPs can recover their shape by changes in temperature, light, pH, or magnetic field, while SMAs primarily use temperature changes.

• SMPs are generally less expensive than SMAs.

Which of the following is NOT a common application of SMMs?

• Aerospace

• Medical devices

• Robotics

• Power generation

In a shape memory alloy, what primarily determines the transformation temperature?

• The alloy composition

• The rate of heating and cooling

• The degree of deformation

• The ambient pressure