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?
- posted
20 years ago
Strain Age Cracking
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- posted
20 years ago
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.