Podcast
Questions and Answers
What type of defect are dislocations classified as?
What type of defect are dislocations classified as?
- Two-dimensional defects
- Three-dimensional defects
- One-dimensional defects (correct)
- Point defects
When are dislocations typically introduced into the lattice of a material?
When are dislocations typically introduced into the lattice of a material?
- When the material is heated
- During solidification of the material (correct)
- During cooling of the material
- When the material is in a stable state
Which type of dislocation is formed by a shear stress applied to produce the distortion?
Which type of dislocation is formed by a shear stress applied to produce the distortion?
- Point dislocation
- Pure screw dislocation (correct)
- Mixed dislocation
- Edge dislocation
What is an edge dislocation characterized by?
What is an edge dislocation characterized by?
Which type of dislocation exhibits components of both edge and screw dislocations?
Which type of dislocation exhibits components of both edge and screw dislocations?
In which type of materials are dislocations particularly useful in explaining deformation and strengthening?
In which type of materials are dislocations particularly useful in explaining deformation and strengthening?
What term is used to describe the dependence of physical properties on crystallographic direction?
What term is used to describe the dependence of physical properties on crystallographic direction?
In which type of materials are the measured properties independent of the direction of measurement?
In which type of materials are the measured properties independent of the direction of measurement?
What increases with decreasing structural symmetry in materials?
What increases with decreasing structural symmetry in materials?
What term describes a specimen composed of anisotropic grains behaving isotropically?
What term describes a specimen composed of anisotropic grains behaving isotropically?
Which property may have different values in different crystallographic directions?
Which property may have different values in different crystallographic directions?
What is the term for the imperfections in atomic arrangements that affect the physical properties of materials?
What is the term for the imperfections in atomic arrangements that affect the physical properties of materials?
What is the maximum allowable concentration of interstitial impurity atoms?
What is the maximum allowable concentration of interstitial impurity atoms?
Why must the atomic diameter of an interstitial impurity be substantially smaller than that of the host atoms?
Why must the atomic diameter of an interstitial impurity be substantially smaller than that of the host atoms?
What do surface defects do in a material?
What do surface defects do in a material?
What causes atomic mismatch at grain boundaries?
What causes atomic mismatch at grain boundaries?
What defines a twin boundary in a material?
What defines a twin boundary in a material?
Why do small interstitial impurity atoms introduce lattice strains in a material?
Why do small interstitial impurity atoms introduce lattice strains in a material?
