Words to know for Materials Engineering
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Modulus | Stiffness; resistance to elastic deformation.
🗑
|
||||
| Strength | Resistance to plastic deformation.
🗑
|
||||
| Hardness | Resistance to localized plastic deformation.
🗑
|
||||
| Toughness | Resistance to fracture.
🗑
|
||||
| Elongation | Extent of ductility...strain to fracture.
🗑
|
||||
| Fatigue Resistance | Resistance to failure by damage accumulation.
🗑
|
||||
| Elastic Deformation | Material reverts back to original shape and size after removal of loads.
-Caused by separation of atoms.
🗑
|
||||
| Plastic Deformation | Application and removal of load results in permanent change in shape/size.
-Caused by defect or molecular motion.
🗑
|
||||
| Linear Densisty | Number of atoms centered on a direction vector/length of the vector.
🗑
|
||||
| Planar Density | Number of atoms centered on a plane/area of the plane.
🗑
|
||||
| Ionic Bond | Low and High electro-negativity.
🗑
|
||||
| Covalent Bond | 2 or more atoms of high electro-negativity.
🗑
|
||||
| Metallic Bond | Metals; low electro-negativity of both.
🗑
|
||||
| Crystalline Defect | Lattice irregularity having one or more dimensions on the order of an atomic diameter.
🗑
|
||||
| Point Defects | Affect chemical and electrical properties, as well as determining phases for a given composition.
🗑
|
||||
| Line defects | responsible for plastic deformation and lower than theoretical strength.
🗑
|
||||
| Planar Defects | Defines internal and external boundaries that affect strength, diffusion, and shape.
🗑
|
||||
| Volume Defects | Can harden material by interacting with other defects...or lead to failure.
🗑
|
||||
| Vacancies | Absense of atoms
🗑
|
||||
| Interstitials | Atoms of elements different than those comprising the basis for the lattice.
🗑
|
||||
| Self-Interstitual | "extra" atom positioned between atomic sites.
🗑
|
||||
| The number of Vacancies... | Increases Rapidly with Temperature.
🗑
|
||||
| Vacancies Occur | -Upon Solidification
-Due to atomic vibrations
-By radiation damage
🗑
|
||||
| Frankel Defect | A cation vacancy - cation interstitial pair.
🗑
|
||||
| Shottky Defect | A paired set of cation and anion vacancies
🗑
|
||||
| Edge Dislocation | Displacement is perpendicular to axis.
🗑
|
||||
| Burger's Vector | measure of lattice distortion.
🗑
|
||||
| Screw Dislocation | Displacement is parallel to Axis.
🗑
|
||||
| Grain Boundaries | Regions between crystals transition from lattice of one region to that of the other.
🗑
|
||||
| Stacking Fault | A stacking fault is a misregistry in the stacking sequence.
🗑
|
||||
| Interdiffusion | in a allow, atoms tend to migrate from regions of high concentration, to regions of low concentrations.
🗑
|
||||
| Diffusion | Process of mass transport that involves the movement of one atomic species into another.
🗑
|
||||
| Assumption | Occurs by random atomic jumps from one position to another.
🗑
|
||||
| Why are jumps more frequent in higher temperatures? | Because of the higher thermal energy of the atoms, so the diffusion rate is more rapid.
🗑
|
||||
| Vacancy Diffusions | Atoms exchange with vacancies; applies to substitution impurities atom. Rate depends on: Number of Vacancies; activation energy exchange.
🗑
|
||||
| Interstitial Diffusion | Smaller atoms can diffuse between atoms. *More rapid then vacancy diffusion.
🗑
|
||||
| Case Hardening | Diffuse carbon atoms into the host iron atoms at the surface.
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
dtp3212
Popular Engineering sets