ve are microscopic representations of two copper samples that have undergone dif
ID: 1047316 • Letter: V
Question
ve are microscopic representations of two copper samples that have undergone different processing steps. The L symbol represents a dislocation. Both Sample 1 and Sample 2 are viewed at the same magnification Abo hich of the two samples would you expect to be more ductile? Explain why. (Don't just state the pertinent difference(s) between the samples, explain WHY a difference affects ductility.) a) W b) If you were to anneal both of the above samples at the same temperature for the same amount of time and then view prepared samples under the microscope (i.e. use the same procedure to view them as what generated the images above would you expect the two samples to look the same? YES or NO (2 pts) c) If YES for (b), why? And how would they look? If NO for (b), why? And how would they look different? (8pts)Explanation / Answer
PART a
Sample 1 will be more ductile as there is no dislocation of atoms in there. Ductility os actually a recognisable property of material by which a material can be drawn into long wires. It is most common in case of Metals. Ductlity is also inversly propotional to the dislocation of atoms.As there is no such dislocation in sample 1 , so it will be more ductile.
Part b
annealing is the process of heating and then cooling a material in order emove the dislocation of the material. In metallurgical process, especially in the recycling phase, this is oneof the most common phenomena..
As in the given case, sample 1 has negligible dislocation while sample 2 has lots of dislpocation in their lattice sites. Hence providing annealing at same temperature for the same amount of time will make sample 1 to be look even better and in case of sample 2, the number of dislocation will decreases but be exactly same as of sample 1. Hence the image that will be generating on the sample will be different. So answer is No.
Part c
Annealing is the function of temperature, time and entropy of the material. Although the temperature and time giving to both sample 1 & 2 is same, but the entropy of both the sample is totally different. Sample 1 has negligible dislocation making its degree of randomness i.e entropy to be minimum. Aneealing will further reduce more entropy bringing the crystal to ideal upto some extent. Sample 2 has lots of dislocation , and annealing is graphically an Exponential decrement process. due to lots of dislocation , by providing annealing at same temperature for the same set of time will make it reach to the the molecular level of sample 1 but till that phase of time , sample 1 has moved to more ideal structure. Thats why the two sample eill never be the same.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.