Multifunctional Materials

Question 1

Bullet point the process of one way memory effect

Answer 1

• As manufactured
• Deformation
• Heating
• Cooling

Question 2

In an Austenite-Martensite phase transformation what transformation is caused by the loading step

Answer 2

Twinned Martensite to Deformed Martensite

Question 3

In an Austenite-Martensite phase transformation what transformation is caused by the heating step

Answer 3

Deformed Martensite to Austenite

Question 4

In an Austenite-Martensite phase transformation what transformation is caused by the cooling step

Answer 4

Austenite to Twinned Martensite

Question 5

Materials with shape memory effect

Answer 5

• Nickel-Titanium Alloys

- Copper-Aluminium-Nickel Alloys

Question 6

Name 3 applications fro shape memory effect materials

Answer 6

• Medical
• Military
• Aerospace

Question 7

Name the three types of hydrogen storage

Answer 7

• High-Pressure Tanks
• Liquid Form
• Solid State (Metal hydrides)

Question 8

Rank Hydrogen storage efficiency from best to worst efficiency

Answer 8

1. Solid State
2. Liquid Form
3. High-Pressure Tanks

Question 9

Name the two metal materials for hydrogen storage

Answer 9

Magnesium and Lithium

Question 10

What is the first stage in hydrogen storage in a metal material

Answer 10

Absorption

Question 11

What is the second stage in hydrogen storage within a metal material

Answer 11

Diffusion

Question 12

How does the Hydrogen change throughout the process of hydrogen storage?
(4 states)

Answer 12

• H2 gas
• Metal Absorbed Hydrogen
• Solid Solution (alpha phase)
• Hydride Phase (Beta phase)

Question 13

Name three types of materials with special thermal expansion coefficients

Answer 13

• INVAR materials
• INOVKO materials
• KOVAR materials