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Course 68484
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Bonus problem 1: Write the “exact” titles of the following chapter.
Chapter 7-
A large number of dislocations produced upon applied stress weaken the yield strength of metallic materials.
When a vacancy is formed in a crystal, entropy of the system increases.
For the following stacking sequence of closed-packed atomic layers found in FCC metals,
. . . A B C A B C B A B C A B C . . .
What is the name of the planar (2D) defect that exists.
Find the crystallographic indices for the direction below. Use the correct type of brackets. The format should be (correct bracket)(space)(index1)(space)(index2)(space)(index3)(space)(correct bracket). For negative number, use - . For example, { 4 2 9 } or < 1 -3 9 >. No grade will be given if you do not follow the format.
Bonus problem 1 (1 point each). Write the Exact Titles of the following chapter. (it should be the exact title. Upper or lower case letters do not matter)
(Chapter 4) -
True stress is defined as force divided by the instantaneous area of the specimen where the force is applied.
Electron microscopes have much higher magnification than optical microscopes because the ( ) of electrons is much smaller than that of visible light..
When vacancies are formed in the crystal structure of a metal, the entropy is lower compared to the case when the metal does not have any vacancies.
An interstitial solid-solution is easily formed when the size of the foreign atom is significantly smaller than the size of the host atom.