Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Metallography Analysis

395 views

Published on

http://massmaterials.com
Massachusetts Materials Research, Inc. is an employee owned (ESOP) Materials Testing, Engineering and Consulting firm. We have been providing Professional Services since 1961, and are part of the MMR Group, Inc.

Published in: Business
  • Login to see the comments

Metallography Analysis

  1. 1. Massachusetts Materials Research, Inc. MMR specializes in the practical application of Materials Testing, Materials Engineering, Failure Analysis and Forensic Engineering. Massachusetts Materials Research,Inc. 1500 Century Drive, West Boylston, MA 01583 Phone: 508-835-6262 Fax: 508-835-9025 http://massmaterials.com
  2. 2. Massachusetts Materials Research, Inc. is an employee owned (ESOP) Materials Testing, Engineering and Consulting firm. We have been providing Professional Services since 1961, and are part of the MMR Group, Inc. The Group includes three divisions, each with its own staff and laboratory to collectively serve diverse markets and locations. We have extensive experience with metals and non- metals, such as plastics, ceramics, and composites. We provide services to the Medical Device Industry, Aerospace Industry, Commercial Manufacturing Industries, the Defense Department, Transportation and Automotive Industries, Municipalities, Nuclear Industry, and Power Generation Industry. We also provide Forensic Engineering, Materials Engineering, Consulting, and Expert Witness Services to the Legal and Insurance professions as well. Not only are our Experts versed in many aspects of Material Science and commercial manufacturing processes, they are equally versed in the processes and procedures of providing Legal Depositions and Professional Courtroom Testimony. We have multiple accreditations and numerous independent vendor approvals.
  3. 3. Types of Materials Analyzed Metals & Alloys, RoHS Materials, Industrial Minerals, Ceramics, Slag’s & Deposits, Residues (Organic & Inorganic), Plastics, Polymers (Non- destructive & Destructive), Rubbers, Elastomers (Non-destructive & Destructive) AnalysisTechniques ICP- Inductively Coupled Plasma/Atomic Emission Spectrometer. (ASTM E1479) Combustion Analysis (Carbon and Sulfur, ASTM E1019) Gas Analysis (Oxygen, Nitrogen, Hydrogen, ASTM E1019) Ion Chromatography (Anions, ASTM D4327, D5085, E165) FTIR- Fourier Transform Infrared Spectrometer (ASTM E573, E3677, E1252) Microscopic FTIR DSC- Differential Scanning Calorimetry - Measures melting point & glass transition temperature. (ASTM D1519, D3418, D4591, E794, E1356) TGA-Thermogravimetric Analysis - Measures filler content.(ASTM E1131) Wet Chemistry (Special Methods, Deposit Loading) Energy Dispersive X-Ray Analysis X-Ray Fluorescence (XRF) & X-Ray Diffraction (XRD) available upon request.
  4. 4. • Tensile Testing from -450°F to 1800°F (ASTM E8) • Charpy Impact (ASTM E23) • 3 pt and 4 pt Bend (ASTM E290, ASME Section IX) • Single, Double, and Lap Shear (AWS D17.2) • Weld Procedure Qualification (ASME Section IX; AWS D1.1, D1.5, D1.2, D17.1, D17.2) • Flexural Strength • Compression Strength (ASTM E9) • Tube Flare and Flattening Tests • Fasteners- Bolts & Nuts • In-house Machine Shop • Specimen & Fixture Machining
  5. 5. Bearing Failure The failed components from a Hydropower Unit Bearing were submitted to MMR in order to perform a root cause failure analysis.The bearing performed satisfactorily for an initial period of 6 days, then, after a brief floating period it encountered a catastrophic failure within 6 hours of being placed back into service. Chemical and metallurgical analyses of the materials and conditions of the different components showed that they met the required specifications and any material related anomalies were ruled out to be contributory to the bearing failure. The damage pattern noted on the bearing components indicated that an external source led to the failure. The rollers were welded to the inner race/cone; minimum damage was noted on the outer race/cup; most of the cage was intact. After in-detail investigation, it was surmised that the cage and rollers were stationary due to the external obstruction.The rotating cone was spinning inside the stationary rollers generating significant friction and heat between the two components which tempered the components causing plastic deformation and eventually welding.The core experienced thermal expansion causing it to destroy the interference fit thus allowing the cone to creep up and freeze on the shaft.
  6. 6. Dental Needle In the case of a dental anesthesia needle breaking off in a patients jaw, MMR was retained by a Law Firm to provide technical support in the case. Fractographic examination of the broken needle and metallurgical analysis of the of the needle microstructure concluded that the failure was the result of bending fatigue which occurred over a period of time. Upon revealing this information to the parties involved, it was disclosed that the single use needle had in fact been used for multiple anesthesia applications and the case was promptly settled.

×