Connecticut Metallurgical Inc.

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Metallography & Mechanical Testing

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Materials Science & Mechanical Engineering Experts

CMI has extensive experience in providing accurate and thorough metallurgy, materials science, and mechanical engineering information. Based in Hartford, Connecticut, you can rely on our scientists to help you get the information you need.

Metallography & Metallurgical Analysis

Superior metallurgical testing services should include the capabilities to perform microscopic, macroscopic, and scanning electron microscope examinations. Our metallurgists and materials analysts have experience with all three. We cover a wide variety of material microstructures and are versed in many aspects of materials science.

Metallography

Specimen Sectioning, Mounting & Preparation
Grain Size Evaluation
Micro-Cleanliness/Inclusion Ratings
Non-Conventional Machining Evaluations
Electric Discharge Machining (EDM)
Laser Beam Machining (LBM)
ECM (Electrochemical Machining)
Abusive Machining Evaluations
Alloy Depletion
Alpha Case

Case Depth & Decarburization Evaluations
Dimensional Assessment
Plating Evaluations
Weld & Braze Evaluation & Qualifications
Fastener Testing
Microstructural Replication
Rockwell Hardness & Microhardness- Vickers & Knoop
Portable Surface Profilometer
Scanning Electron Microscopy

Metallography Equipment

Mechanical Testing, Creep & Stress Rupture

Mechanical testing is used to determine a material's strength by applying loads that pull, compress, impact, bend, or cycle the material. These techniques can be used to verify proper processing as well as to help determine a materials durability and performance capability in everyday applications.

Mechanical Testing and Metals

Creep & Stress Rupture

CMI has built its reputation for creep and stress rupture testing in the aerospace, power generation, and other critical industries by providing both conformity assessment testing and research and development support. With over 75 test frames and state-of-the-art data acquisition and control apparatus, we offer unparalleled temperature accuracy, flexibility, and in-process data access.

Room Temperature to 2000°F 
Cyclic Stress Rupture
Stress Rupture in Atmosphere
Hydrogen Embrittlement Testing to ASTM 519-1A
Machine Ratios 3:1, 5:1 & 20:1

Direct Load Ratio 1:1
Automated Cycle & Data Acquisition
Short & Long Term Testing
Standard & Special Fixturing Accommodations

Mechanical Testing

Tensile Testing up to 2000°F
3 PT & 4 PT Bend
Single Lap Shear Testing
Weld Procedure Qualification
Flexural Strength
Compression Strength

Tube Flare & Flattening Tests
Fastener Testing- Bolts & Nuts
In-house Heat Treating
Machine Shop Access for Specimen Sectioning & Fixture Machining

Corrosion Testing

Environmental degradation of materials related to corrosion accounts for $280 billion dollars per year in damage to metallic structures. Our salt fog testing chamber and other corrosion testing protocols can help to ensure failure prevention resulting from exposure to certain harsh environments.

Salt Spray- ASTM B117

CMI performs salt spray/salt fog testing per ASTM B117. Salt spray testing provides a controlled corrosive environment that is used to produce relative corrosion resistance information for metallic specimens, both coated and uncoated, when exposed to a given set of conditions within a controlled test chamber.

Salt Spray- ASMT B117 Machine
Samples are placed in a sealed salt fog chamber or cabinet, which mixes hot air and a salt solution to create a corrosive environment that is intended to simulate weathering and potential corrosion that metals and other components would experience in nature over long periods of time.

Intergranular Attack- ASTM A262

Intergranular Attack- ASTM A262

Testing is performed to five different standard practices or methods used for detecting the susceptibility of austenitic stainless steels to intergranular attack. The standard covers a variety of processes to include preparation of the test specimens, apparatus setup and testing procedures, calculations, rapid screening tests, reporting information for each testing practice.

Other Corrosion Testing Service Include:
Corrosion Testing of Titanium per PWA-MCL E205 & ASTM F945

Capabilities & Services

Commercial & Industrial Failure Analysis
Insurance Claims & Litigation Support
Materials Consulting & Recommendations


Taber Abrasion Testing

The rotary platform abrasion tester is a standard instrument. It is typically used for evaluating abrasion and wear resistance of certain coating systems.

Capabilities & Services Testing
Taber Abrasion Testing Equipment

Testing involves placing a specimen on a turntable platform that rotates at a fixed speed and then applying abrasive wheels at a specified pressure. As the turntable rotates, the wheels are driven by the sample in opposite directions on a horizontal axis which is then offset from the center axis of the sample. The abrading wheels then rub the specimen while a vacuum system removes loose debris during testing.


Resistance to abrasion may be affected by factors including test conditions such as the type of abrasive wheel being used, the mounting pressure, or tension between the specimen and wheel, and the type of specimen or finish of the materials being tested.