SMA and PZT in Mechatronics & Smart Materials
20 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main reason behind the unique properties of shape memory alloys (SMA's)?

  • Solid state phase change and molecular rearrangement (correct)
  • Complex FCC structure
  • Temperature-dependent crystal structures
  • Composition of Nickel Titanium
  • Which phase of the shape memory metal alloy is hard, firm, and inelastic?

  • Copper Aluminum phase
  • Austenite (correct)
  • Martensite
  • Nickel Titanium phase
  • What role does the martensite phase of the shape memory metal alloy play in its behavior?

  • It is hard and inelastic, similar to austenite
  • It maintains a complex FCC structure
  • It is soft and elastic, allowing easy deformation (correct)
  • It resembles titanium in its properties
  • What happens to the shape memory alloy as it is cooled to the martensite phase?

    <p>It can be easily deformed (B)</p> Signup and view all the answers

    What quality allows the shape memory alloy to reform to its original shape when the temperature is raised to the austenite phase?

    <p>Ability to 'remember' its austenite phase (C)</p> Signup and view all the answers

    What is pseudoelasticity in shape memory alloys (SMAs)?

    <p>The ability of the alloy to withstand strains of up to 8% and return to the austenite phase when the load decreases or there is a change in temperature (D)</p> Signup and view all the answers

    What is the most common mix of shape memory alloys (SMAs) based on the text?

    <p>Roughly 50% nickel and 50% titanium (A)</p> Signup and view all the answers

    How does pseudoelasticity (superelasticity) occur in shape memory alloys (SMAs)?

    <p>When the alloy is above the martensite temperature, but there is a load strong enough to force the austenite into the martensite phase, and it does not return to the austenite phase until the loading is decreased or there is a large enough change in temperature (C)</p> Signup and view all the answers

    What are Flexinol wires designed to do according to the text?

    <p>Take more repeated stress cycles than pure NiTi mixes (D)</p> Signup and view all the answers

    In what biological applications can Nitinol wires be used based on the text?

    <p>Bone plates, surgical anchors, clot filters, catheters, retainers, eyeglasses, and aircraft maneuverability (B)</p> Signup and view all the answers

    What are the two unique properties exhibited by shape memory alloys (SMA's)?

    <p>Pseudo-elasticity and the shape memory effect (B)</p> Signup and view all the answers

    What temperature dependent crystal structures do shape memory metal alloys exist in?

    <p>Martensite and austenite (C)</p> Signup and view all the answers

    What happens to the shape memory alloy as it is cooled to the martensite phase?

    <p>It can be easily deformed (B)</p> Signup and view all the answers

    What type of structure does the austenite phase of shape memory metal alloy have?

    <p>Simple FCC structure (D)</p> Signup and view all the answers

    What quality allows the shape memory alloy to reform to its original shape when the temperature is raised to the austenite phase?

    <p>Ability to remember its austenite phase (D)</p> Signup and view all the answers

    What is the main characteristic of pseudoelasticity (superelasticity) in shape memory alloys (SMAs)?

    <p>The alloy changes to the martensite phase when subjected to strain. (D)</p> Signup and view all the answers

    What is the purpose of Flexinol wires, as mentioned in the passage?

    <p>To lift heavy loads with minimal electric current. (B)</p> Signup and view all the answers

    What is the role of the martensite phase in shape memory metal alloy behavior?

    <p>It allows the alloy to change shape depending on temperature. (B)</p> Signup and view all the answers

    What quality allows Nitinol wires to promote healing in biological applications?

    <p>Memory effect to pull bones together and prevent tissue damage. (B)</p> Signup and view all the answers

    What happens to Nitinol wires when subjected to a change in temperature, as mentioned in the passage?

    <p>They change states at different temperatures within a narrow range. (A)</p> Signup and view all the answers

    More Like This

    Mechatronics System Design Fundamentals Quiz
    15 questions
    What is Mechatronics?
    10 questions

    What is Mechatronics?

    CostEffectiveHummingbird avatar
    CostEffectiveHummingbird
    Use Quizgecko on...
    Browser
    Browser