The magnifications I used are 200X; 500X; and 1000X.
|
This is the pedal of a garbage-can lid that broke at my
house in Framingham, Massachusetts, in 1961. It is an aluminum
alloy of unknown composition. It was very brittle, and so I
attempted to improve it by a prolonged anneal, which only spheroidized
the grey phase a little bit, and with only a meager effect on the
toughness. This is the original microstructure. The magnifications I used are 200X; 500X; and 1000X. |
|
Again, describe what phases you can count, and try to work
out which alloying elements are most likely present and absent. |
|
Write out your
answer; complete all or
part of the set; and
then apply
for a
Username & Password so you can activate the link at the bottom of this page. |
| Answer: Follow this link. |