Fall 2005
|
MSE 205: Introduction Materials
Science and Engineering
Fall 2005 |
Lecture Movies
Streaming videos of the lectures and AVI/MPEG videos of the demonstrations are given for the convenience of students who miss a class or wish to review the material. Please note that technological failures may limit the usefulness of these movies, so it is preferable that students attend class regularly!
You will need to install RealPlayer to view the lectures. You can download this program for Mac or Windows at the OIT Site License Software page.
For information about how to set your connection speed for proper viewing,
check
here or call OIT at 688-HELP (8-HELP on campus).
| Lecture Movies | Demo Movies |
| Lecture 1 (9/21/05) | |
| Lecture 2 (9/23/05) (There were some technical difficulties with the video portion of this lecture. This is a restored version.) | |
| Lecture 3 (9/26/05) | |
| Lecture 4 (9/28/05) | BCC -> FCC transition of iron:
Iron has a BCC crystal structure at room temperature. In this demonstration, current is applied to heat the bare wire, causing thermal expansion (i.e. the wire lengthens). At 914 C, the crystal structure transforms from BCC to FCC. The higher atomic packing fraction of the FCC structure results in the wire becoming shorter before continuing to lengthen again due to thermal expansion. Upon cooling, the FCC wire first contracts, then lengths significantly as it transforms to BCC, then continues to contract. (The effect is much more dramatic during cooling.) Note that the video begins with a short explanation; the demonstration begins about halfway through. |
| Lecture 5 (9/30/05) | |
| Lecture 6 (10/3/05) | |
| Lecture 7 (10/5/05) | |
| Lecture 8 (10/7/05) | |
| Lecture 9 (10/10/05) | |
| Lecture 10 (10/12/05) | |
| Lecture 11 (10/14/05) | |
| Lecture 12 (10/17/05) (A student recently informed me that the audio is very low on this movie. It appears that the microphone battery died between my sound check and the beginning of the lecture! Please let me know if you have questions about this material.) | |
| Lecture 13 (10/21/05) (It was during this sound check that I realized the microphone battery was dead (see above). This lecture was recorded using the computer's built in mic. Please let me know if you have questions.) | |
| Lecture 14 (10/24/05) | Ductile -> Brittle Transition:
In this experiment, we compare the impact toughness of notched aluminum and steel (iron-carbon) at room temperature and liquid nitrogen temperature (-196 C). Aluminum has an FCC crystal structure, while iron is BCC at room temperature and below. Both metals are ductile at room temperature and therefore bend, but do not break, when impacted with a hammer. After being immersed in liquid nitrogen, the aluminum remains ductile, while the iron becomes brittle and breaks very easily. |
| Lecture 15 (10/26/05) | |
| Lecture 16 (10/28/05) | |
| Lecture 17 (10/31/05) | |
| Lecture 18 (11/2/05) | |
| Lecture 19 (11/7/05) | |
| Lecture 20 (11/9/05) | |
| Lecture 21 (11/14/05) | |
| Lecture 22 (11/16/05) | |
| Lecture 23 (11/18/05) | Shrinking Plastic Bottle
Plastic soda bottles are made by a blow molding technique in which high pressure steam expands the solid but formable tube shaped preform (the parison) into a mold. This predeformation by drawing can be reversed by reheating the bottle, giving the stretched chains enough energy tospontaneously recoil (increasing entropy), thereby shrinking the bottle. In this demonstration, boiling water is poured into a plastic water bottle, which immediately shrinks. Note that the bottle continues shrinking slowly as the water cools. Water can be seen running down the side of the bottle as it is pushed out the top when the volume decreases. |
| Lecture 24 (11/21/05) | |
| Lecture 25 (11/23/05) | |
| Lecture 26 (11/28/05) | |
| Lecture 27 (11/30/05) | |
| Lecture 28 (12/2/05) |