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Metallurgical Failure Analysis

Circuit Board Corrosion Causing Failure

Iron (rust) contamination caused this circuit board to fail in service.

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Metallurgical Failure Analysis is performed in a most expedient manner using the latest in analytical equipment and techniques in order to determine the cause(s) of the failure. The primary objectives is to establish the true failure mode. Solutions to prevent premature failures in future products are provided as part of a failure analysis.

Terminology

The following terms relate to Failure Analysis:

Corrosive Wear
A term appied when an acid, cuastic, or other corrosive medium comes in contact with metal parts.
Erosion Wear
A term applied to erosion of a material by particles or gasses that impinge on the surface at high velocities.
Fatigue
The phenomenon leading to fracture uner repeated or fluctuating stresses.
Fatigue Failure
Fracture in a material due to conditions of repeated cuclic overload.
Fatigue Strength
A measure of the load-carrying ability of a material subjected to loading which is repeated a definite number of cycles. The maximum alternating stress amplitude sustained by a material, sbjected to a specific mean stress, for a specific number of cycles without failure. Fatigue rated materials are never loaded more than 50 percent of the measured elastic limit.
Surface Fatigue
A term applied where excessive side thrust has been applied to a bearing, often found on roll or ball bearing races or sleeve bearings, resulting in fine checks (cracks) or spalling (small pieces falling out on the surface).