Customer Service

 Customer Survey

LABConnect™ - Online Results & More

Tutorial | Create Account | Login

Metal and Stain

Category Materials Testing Lab
Test Metal and Stain
Description

Test Type:            Failure Analysis

Matrix:                 Special

 

A manufacturer of turbine engines was experiencing problems with one line of turbines.  Something was causing the blades to brake loose causing catastrophic failure.  The investigation centered on a new brand of bearings that were being used.  The manufacturer of the bearings claimed that they were high-grade stainless steel, however, analysis by Scanning Electron Microscopy (SEM) proved otherwise.


0-ring bearing

A cross-section of the bearing was analyzed so that the O-ring and the metal would be visible.  In the photograph above can be seen dark spots throughout the metal.  These are places of high carbon content.  Stainless steel does not contain these abnormalities.  Furthermore, the circled area is rust pitted metal.

 

The cause of the failure in the engines was insufficiently manufactured bearings.  These bearings are water-cooled and had a tendency to rust.  The pitting allowed the cooling water to penetrate the turbine chamber.  It only takes a few drops of water to break turbine fins that are traveling over 10,000 revolutions per minute and cause the catastrophic failures.

 

 

Test Type:            Stain Analysis

Matrix:                  Special

 

On occasion it is important to identify stains.  Ink, rust, paint, food and blood are only the tip of the iceberg.  By utilizing numerous techniques such as Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectrometry, and physical chemistry we can determine the source of the discoloration.

FTIR scan of tar stain

Human Red Blood Cells

 


Ann Arbor, MI - NVLAP Lab Code 101048-4Atlanta, GA - NVLAP Lab Code 101048-1Baton Rouge, LA - NVLAP Lab Code 200375-0Beltsville, MD - NVLAP Lab Code 200293-0Boston, MA - NVLAP Lab Code 101147-0Buffalo, NY - NVLAP Lab Code 200056-0Calgary, Alberta - NVLAP Lab Code 500100-0Carle Place, NY - NVLAP Lab Code 101048-10Charlotte, NC - NVLAP Lab Code 200841-0Chicago, IL - NVLAP Lab Code 200399-0Corporate - Cinnaminson, NJ - NVLAP Lab Code 101048-0Dallas, TX - NVLAP Lab Code 600111-0Denver, CO - NVLAP Lab Code 200828-0EMSL Canada - Montreal -- Quebec - NVLAP Lab Code 201052-0EMSL Canada -- Toronto - NVLAP Lab Code 200877-0EMSL Canada Inc. -- Ottawa - NVLAP Lab Code 201040-0Fort Lauderdale - NVLAP Lab Code 500085-0Houston, TX - NVLAP Lab Code 102106-0Huntington Beach, CA - NVLAP Lab Code 101384-0Indianapolis, IN - NVLAP Lab Code 200188-0Inland Empire, CA - NVLAP Lab Code 600239-0Jacksonville, FL - NVLAP Lab Code 600265-0Kernersville, NC - NVLAP Lab Code 102104-0Las Vegas, NV - NVLAP Lab Code 600140-0Miami, FL - NVLAP Lab Code 200204-0Minneapolis, MN - NVLAP Lab Code 200019-0New York, NY - NVLAP Lab Code 101048-9Orlando, FL - NVLAP Lab Code 101151-0Pasadena, CA - NVLAP Lab Code 200232-0Phoenix, AZ - NVLAP Lab Code 200811-0Piscataway, NJ - NVLAP Lab Code 101048-2Plymouth Meeting, PA - NVLAP Lab Code 200699-0Raleigh, NC - NVLAP Lab Code 200671-0Rochester, NY - NVLAP Lab Code 600183-0S. Portland, ME - NVLAP Lab Code 500094-0Salem, NH - NVLAP Lab Code 201051-0San Diego, CA - NVLAP Lab Code 200855-0San Leandro, CA - NVLAP Lab Code 101048-3Seattle, WA - NVLAP Lab Code 200613-0St. Louis, MO - NVLAP Lab Code 200742-0Tampa, FL - NVLAP Lab Code 600215-0Vancouver, BC - NVLAP Lab Code 201068-0Wallingford, CT - NVLAP Lab Code 200700-0West Palm Beach, FL - NVLAP Lab Code 600206-0Weymouth, MA - NVLAP Lab Code 600217-0
Sorry, this function is disabled.