Accession Number : ADD013127

Title :   Liquid Crystal Non-Destructive Inspection of Non-Ferrous Metals.

Descriptive Note : Patent, Filed l4 Jun 85, patented 26 May 87,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Pech,Gregory J

Report Date : 26 May 1987

Pagination or Media Count : 8

Abstract : A non-destructive inspection arrangement for ferrous and non-ferrous metallic workpieces. The inspection arrangement employs a liquid crystal indicator medium and electrical current flow through the workpiece to develop potential differences across work surface flaws that are to be detected. The concepts of direct application of the liquid crystal medium to the work area surface and containment of the liquid crystal medium within a view device are also included.

Descriptors :   *PATENTS, *NONDESTRUCTIVE TESTING, *LIQUID CRYSTALS, *METALS, *INDICATORS, ELECTRIC CURRENT, SURFACE ANALYSIS, VISUAL INSPECTION, FATIGUE(MECHANICS), CRACKS

Subject Categories : Test Facilities, Equipment and Methods
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE