6. Non-Destructive Evaluation (NDE) - sometimes used when destructive evaluation is not an option or prior to any destructive testing to document crack locations and to sort parts by the worst-case crack if multiple parts are suspect and time or cost prevents the evaluation of numerous samples. This can include a high magnification examination, liquid penetrant, magnetic particle inspection (MPI) and X-ray to name a few.
We have evaluated failures from a wide variety of industries and applications.
1. Optical Microscopy - including magnification to 50X and visual examination along with photographic documentation.
5. Metallographic Examination - Cross-sections can be excised from areas of interest in the sample being evaluated and the microstructure can be examined at high magnification using a metallograph. The microscructure at a fracture location can be evaluated to determine if there were specific microstructural defects or anomalies that contributed to fracture initiation and/or propagation - these defects or areas of interest can be documented photographically.
Failure Analysis at Express Testing
2. Chemical Analysis - the evaluation of a sample to determine if the composition meets the design/print specifications and to see if any potentially problematic constituents are present.
Customers include automotive, aerospace, medical, heavy equipment, oil/gas equipment, sporting goods, fastener, electronics and appliance manufacturers to name a few.
4. Hardness/Microhardness Measurement - can vary from routine checks via Rockwell and Brinell hardness to the documentation of small microstructural features and metallurgical cases using microhardness measurement.
The information and data collected during the failure analysis investigation is reviewed and documented in a formal report which includes information related to the failure mode, photographic documentation, condition of the material in question and recommendations regarding future avoidance of failures (if applicable).
3. SEM Analysis - Scanning Electron Microscopy (SEM) facilitates the evaluation of fracture surfaces and other important features at extremely high magnification. Material defects can be identified and in the case of an unwanted inclusion it can be chemically analyzed while in the SEM using Energy Dispersive Spectroscopy (EDS) chemical analysis to determine it's potential origin.
After the initial evaluation and the development of an analysis plan, the samples can be examined further using a variety of analytical techniques:
Material Testing Laboratories
2910 N. Powers Blvd., #188, Colorado Springs, CO 80922 719-375-1780
The failure analysis begins with a thorough documentation of the part or assembly being evaluated.
We have an extensive failure analysis background along with a high level of experience in the associated analytical techniques.
This is done visually and with the aid of stereo microscopes. Photographic documentation of the condition of the samples in the as-received condition is critical prior to any disassembly or destructive evaluation.
Express Testing, Inc.