Stresses in thermally grown alumina scales near edges and corners.

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We have investigated the residual stress near edges and corners of thermally grown alumina scales. Micro-fluorescence measurements, performed on alloys with composition Fe-5Cr-28Al (at.%, bal. Fe) oxidized at 900 C, showed a large (>50%) reduction in hydrostatic stress in the vicinity of edges and corners. Surprisingly, stress relaxation persists out to distances ten times the scale thickness from the edge. Finite element analysis calculations confirm the experimental results and provide a considerably more detailed picture of the stress distribution and its components.

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12 p.

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Grimsditch, M. June 3, 1998.

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Description

We have investigated the residual stress near edges and corners of thermally grown alumina scales. Micro-fluorescence measurements, performed on alloys with composition Fe-5Cr-28Al (at.%, bal. Fe) oxidized at 900 C, showed a large (>50%) reduction in hydrostatic stress in the vicinity of edges and corners. Surprisingly, stress relaxation persists out to distances ten times the scale thickness from the edge. Finite element analysis calculations confirm the experimental results and provide a considerably more detailed picture of the stress distribution and its components.

Physical Description

12 p.

Notes

OSTI as DE00010677

Medium: P; Size: 12 pages

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  • 193rd Electrochemical Society Meeting, San Diego, CA (US), 05/03/1998--05/08/1998

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  • Report No.: ANL/MSD/CP-95844
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 10677
  • Archival Resource Key: ark:/67531/metadc623254

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Office of Scientific & Technical Information Technical Reports

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  • June 3, 1998

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 6, 2017, 8:10 p.m.

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Grimsditch, M. Stresses in thermally grown alumina scales near edges and corners., article, June 3, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc623254/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.