Line Defect (Leaving Cert Engineering): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What are line defects in crystalline materials?
What are line defects in crystalline materials?
Structural imperfections along a line
In how many dimensions do line defects extend through a material?
In how many dimensions do line defects extend through a material?
One dimension
What is a dislocation in materials science?
What is a dislocation in materials science?
An incomplete row of atoms
What type of stress causes dislocations to become mobile?
What type of stress causes dislocations to become mobile?
Shear stress
What are forces that try to slide one part of a material past another called?
What are forces that try to slide one part of a material past another called?
Shear stress
Where does a dislocation travel towards under applied stress?
Where does a dislocation travel towards under applied stress?
From interior towards surface
What typically forms when a dislocation reaches the surface?
What typically forms when a dislocation reaches the surface?
A crack starting point
Why do dislocations move more easily than perfect crystal deformation?
Why do dislocations move more easily than perfect crystal deformation?
Less energy is required
How can dislocations change mechanical properties of materials?
How can dislocations change mechanical properties of materials?
Make them harder or more brittle
What does the incomplete row of atoms in a dislocation create?
What does the incomplete row of atoms in a dislocation create?
Areas of high stress