Strain Age Cracking

Anyone out there ever had any problems associated with this in
precipitaion hardenable alloy? Could someone offer some details on
how this happens and how to avoid it?
Reply to
Leonard Brick
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It's a standard problem with Ni base superalloys. The volume contraction on precipitation leads to stress's that can cause cracks, usually at grain boundaries. Minimize the solutioned area in the HAZ, if possible a soft compliant filler, sometimes overaging helps other times solutioned depends on the precipitation kinetics of the alloy, heat input and speed.
Reply to
Enyo

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