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Metallurgical Engineer Expert Sam Pendergrass

Sam Pendergrass
160 Bevan Drive
Mooresville NC 28115
phone: 704-663-5108
fax: 704-662-0898
Metallurgical Technologies, Inc. (MTi) is a Metallurgical Engineering Service Laboratory specializing in Forensic Failure Analysis of Metallurgical Components. We also offer testing, analysis, and consulting services. By performing a comprehensive failure analysis, the root causes of failures are identified, metallurgical problems are solved and recommendations are made to prevent future reoccurrences. MTi uses the most advanced analytical equipment and techniques. Test results are interpreted and recommendations are made by licensed professional engineers registered in the discipline of metallurgical engineering.

Our consultants are experts in their field. An in-depth report of our findings approved by an expert metallurgical engineer typically includes: interpretation of test data, conclusions, opinions, and recommendations to improve performance or prevent future problems. MTi has the experience and ability to provide technical support and expert consulting on Metallurgical Engineering Issues and Cause of Failure in Litigation and Insurance Claims. Our metallurgical engineers have provided expert witness services in litigation regarding metallurgical engineering and failure analysis.

Services Offered:
  • Failure Analysis
  • Corrosion Investigation
  • Spectrometry / Scanning Electron Microscopy
  • Metallography
  • Defect Investigation
  • Mechanical Testing
  • Chemical Analysis
  • NDT (Non-destructive Testing)
  • Reverse Engineering
  • Consulting
  • Weld Engineering
  • Miscellaneous Testing /
  • A cracked XXXXX polymer filament die plate was received for analysis to determine the cause of cracking. Results indicate the die plate cracked as a result of a brittle nitrided case and an insufficient cross-sectional area of the narrow ligament between the cap screw hole and the heater cartridge hole on the inlet face.

    6/14/2013 · Metallurgy
    Two cores from a marine diesel engine oil cooler were received for analysis to investigate the cause of failure via leaking. Results indicate that the cooler core failed due to pitting corrosion initiated on the interior (oil side) at the edge of the fins.

    4/19/2013 · Failure Analysis
    The information contained in this report is confidential property of our client and is intended solely for the use of the named recipient(s).

    3/11/2013 · Failure Analysis
    A fractured input shaft used in NASCAR racing was received for analysis to investigate the cause of failure. Results indicate the shaft fractured due to fatigue progression from an intergranular stress crack, initiated at a dot peen identification marking on the shaft.

    1/16/2013 · Failure Analysis
    A cracked nozzle sleeve stub from XXXX Vessel of the proprietary vaporizer system was analyzed to determine the cause of cracking.

    11/7/2012 · Failure Analysis
    Two blade samples of a cracked ******************* centrifugal blower impeller blade was submitted for metallurgical analysis of the cracks. The cracks in the submitted blade samples were found to have initiated at corrosion pits on the leading edge of the blades.

    8/28/2012 · Failure Analysis
    Two aluminized heater tubes were received for analysis to investigate the cause of failure. Unused tube material also was supplied for comparison. Results indicate that the tubes failed via hot oxidation corrosion at extreme temperatures.

    6/22/2012 · Failure Analysis
    Metallurgical Technologies, Inc. examined a failed superheater tube from XXXXXX X XXX Boiler #7. The ASME SA-213 Grade T11 tube had been in service for 6 to 8 years until failure. The mode of failure was short-term stress rupture due to significant overheating.

    4/17/2012 · Metallurgy
    The four seized bearings submitted for metallurgical analysis were determined to have suffered deterioration of their grease to the point that it was inhibiting motion rather than enabling. The grease had turned to a thick (viscous) black sludge that was full of particulate. Electrical pitting was found in the seized bearings, especially the inner races. Signs of axial (thrust) loads were noted, mainly in the outer raceways. Larger arc strike regions were found on the balls.

    3/13/2012 · Failure Analysis
    A cracked 316Ti stainless steel preheater tube was analyzed to determine the failure mechanism. A second non-cracked tube section from a different elevation was also analyzed to determine the condition of the tube material.

    9/1/2011 · Metallurgy
    A welded left front spindle/steering arm assembly that had fractured at the fillet weld joint between the steering arm and inner brake boss was received for analysis to determine the mode of failure.

    6/6/2011 · Metallurgy
    Several concentrating still condenser tubes exhibiting pitting were received to determine the cause of pitting. Results indicate the tubes pitted initially from the inner diameter (ID) surface due to microbiological corrosion (MIC). MIC pitting initiated preferentially at the tube seam weld. Additional ID surface pits and significant pit enlargement of MIC pits due to chloride pitting were also observed. The chlorine is likely remains from the hydrochloric cleaning process

    5/4/2011 · Corrosion
    Corrosion is a phenomenon leading to exorbitant losses of materials, energy, and money by causing degradation of products, materials of construction, equipment, and necessitating increased maintenance.