Stainless also work hardens due to vibration and then tends to crack. Some alloys are better than others.
“Stainless also work hardens due to vibration and then tends to crack. Some alloys are better than others.”
So does copper. Saw that a lot in refrigeration applications near compressors. As you say, you have to design the alloy to the application or mitigate the vibration issue in some way.
With copper, we installed vibration eliminators in the line and with capillary tubes we coiled them carefully and applied a bead of silicone RTV across the coils to keep the coils from rubbing on one another.