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flash annealing

thread330-478658

flash annealing

flash annealing

(OP)
I'm looking for an equation or way to calculate time versus temperature in annealing. The goal is to use the shortest time possible(flash annealing).

RE: flash annealing

Larson Miller parameters.
If you are talking about foil that is a few thousandths of an inch thick then you can anneal in a couple of seconds.
Otherwise the outer surface gets too hot (grain growth or incipient melting) before the inside sees enough time at temp to anneal.
What alloy?

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P.E. Metallurgy, consulting work welcomed

RE: flash annealing

(OP)
It is .01 inch(.025 mm) thick and it is C26000 brass alloy.

RE: flash annealing

Anneal at the top end of the range 700-750F. Above this grain growth will be an issue.
Just be warned that rapidly heating to this temp may cause more distortion.
As an ides 15sec at 750F is roughly equivalent to 9min at 650F.

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P.E. Metallurgy, consulting work welcomed

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