- #1
Femme_physics
Gold Member
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I was watching this charpy impact test video clip -
I fail to understand 2 things.
A) Why do they cool the metal with liquid nitrogen before they test it? It seems wasteful. Set the standard testing temperature to 25 degrees instead.
B) What happens to the metal after it gets hit? Does it always break apart? If so, how do we measure its impact strength if it always breaks apart?
I fail to understand 2 things.
A) Why do they cool the metal with liquid nitrogen before they test it? It seems wasteful. Set the standard testing temperature to 25 degrees instead.
B) What happens to the metal after it gets hit? Does it always break apart? If so, how do we measure its impact strength if it always breaks apart?
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