Hi Jonathan

To say something we need to see the fracture since there are many possible reasons. Do you have pictures? If not I suggest you contact a failure analysis lab.

Best regards

Guenter

Guenter Grossmann
Swiss Federal Institute for Materials Testing and Research EMPA
Centre for Reliability
8600 Duebendorf
Switzerland

Phone: xx41 1 823 4279
Fax :      xx41 1823 4054
mail:     [log in to unmask]

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