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Title: Nondestructive method and apparatus for imaging grains in curved surfaces of polycrystalline articles

A nondestructive method, and associated apparatus, are provided for determining the grain flow of the grains in a convex curved, textured polycrystalline surface. The convex, curved surface of a polycrystalline article is aligned in a horizontal x-ray diffractometer and a monochromatic, converging x-ray beam is directed onto the curved surface of the polycrystalline article so that the converging x-ray beam is diffracted by crystallographic planes of the grains in the polycrystalline article. The diffracted x-ray beam is caused to pass through a set of horizontal, parallel slits to limit the height of the beam and thereafter. The linear intensity of the diffracted x-ray is measured, using a linear position sensitive proportional counter, as a function of position in a direction orthogonal to the counter so as to generate two dimensional data. An image of the grains in the curved surface of the polycrystalline article is provided based on the two-dimensional data. 7 Figs.
Inventors:
Issue Date:
OSTI Identifier:
55816
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; SCA: 420500; PA: EDB-95:085502; SN: 95001393846
Patent Number(s):
US 5,418,828/A/
Application Number:
PAN: 8-117,856
Contract Number:
AC05-84OR21400
Resource Relation:
Other Information: PBD: 23 May 1995
Research Org:
Lockheed Martin Energy Syst Inc
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; NONDESTRUCTIVE TESTING; EQUIPMENT; POLYCRYSTALS; X-RAY DIFFRACTION; GRAIN ORIENTATION; POSITION SENSITIVE DETECTORS; X RADIATION; IMAGE PROCESSING

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