Alpha Case

Alpha case contamination of Titanium alloys results from oxygen or nitrogen pick-up during heat treatment. This brittle surface structure is prone to microcracking, and reduces the metal's performance and fatigue properties.

 

A Metaltest Alpha Case evaluation will reveal the depth and composition of the alpha case structure. The image at the right is a micrograph of Titanium 6AL-4V with a cascading alpha case effect. While alpha case may be prevented by heat treating in a vacuum, most often it is simply removed by mechanical grinding or chemical etching. A Metaltest Alpha Case evaluation will show you how much metal must be removed. 

 

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Alpha case evaluation is performed according to customer drawings or specifications.

Applicable Specifications
Alpha Case evaluation of titanium contamination of surface microstructure by gasses is performed according to prime contractor or industry specifications.
 

Metaltest Accreditations

NADCAP
Materials Testing

prilogo
AC7006
Scope of Approvals

Aerospace Approvals

Metaltest is OEM approved to perform military and commercial aerospace testing for a wide range of prime contractors including:

  • Boeing
  • Bombardier
  • Cessna
  • Goodrich
  • Gulfstream
  • Hawker Beechcraft
  • Sikorsky

Nuclear Approvals

Metaltest is NQA-1 Compliant for nuclear power testing. Our clients include:

  • ABW Technologies 
  • Alaskan Copper

Industry Associations

Metaltest holds memberships in the following industry associations:

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