Shape Memory Alloys Questionary
With this quiz you will be able to show what you know about Shape Memory Alloy's.
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Pregunta
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Respuesta correcta
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What does the acronym SMA stand for? :
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Shape Memory Alloy. |
What makes a shape memory alloy special? :
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It recovers its original shape when heated. |
Which material is a typical example of a shape memory alloy? :
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Nitinol. |
What is Nitinol made of? :
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Nickel and titanium. |
What causes an SMA to change shape? :
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Temperature |
Where are SMAs used in medicine? :
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In stents (tubes that open up arteries). |
What is the phenomenon that causes SMAs to return to their original shape called? :
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Shape memory effect. |
What happens when you heat a deformed SMA? :
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It recovers its original shape. |
What other property do some SMAs have, apart from recovering their shape? :
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They stretch a lot without breaking. |
What are SMAs used for in industry? :
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To open valves automatically. |
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Pregunta
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Respuesta correcta
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What is the advantage of SMAs? :
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They can be used many times. |
What does it mean for a material to be "superelastic"? :
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It can stretch and return to its shape without heating. |
Which medical devices use Nitinol? :
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Stents. |
What happens when an SMA cools down after heating? :
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It hardens and keeps its shape. |
What is the form of SMA called when cold? :
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Martensite. |
And what is the shape called when it is hot? :
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Austenite. |
What happens inside the material during the shape change? :
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It changes its internal structure. |
Which of these is not a common application of SMAs? :
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House paint. |
Why are SMAs used in satellites or aircraft? :
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Because they are light and strong. |
What is a possible disadvantage of SMAs? :
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They can only withstand a limited number of uses. |
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