Coherent optical methods for metallography

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Numerous methods based on coherent optical techniques have been developed over the past two decades for nondestructive evaluation, vibration analysis and experimental mechanics. These methods have a great deal of potential for the enhancement of metallographic evaluations and for materials characterization in general. One such technique described in this paper is the determination of the material damping factors in metals. Damping loss factors as low as 10-5 were measured on bronze and aluminum specimens using a technique based on laser vibrometry. Differences between cast and wrought bronze were easily distinguishable as well as the difference between the bronze and aluminum. ... continued below

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Pages: (10 p)

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Pechersky, M.J. January 1, 1991.

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Description

Numerous methods based on coherent optical techniques have been developed over the past two decades for nondestructive evaluation, vibration analysis and experimental mechanics. These methods have a great deal of potential for the enhancement of metallographic evaluations and for materials characterization in general. One such technique described in this paper is the determination of the material damping factors in metals. Damping loss factors as low as 10-5 were measured on bronze and aluminum specimens using a technique based on laser vibrometry. Differences between cast and wrought bronze were easily distinguishable as well as the difference between the bronze and aluminum. Other coherent optical techniques may be used to evaluate residual stresses and to locate and identify microcracking, subsurface voids and other imperfections. These techniques and others can serve as a bridge between microstructural investigations and the macroscopic behavior of materials.

Physical Description

Pages: (10 p)

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OSTI; NTIS; GPO Dep.

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  • 24. annual convention of the International Metallographic Society, Inc. (IMS): structure-property relationships and correlations with the degradation of engineering materials, Monterey, CA (United States), 29 Jul - 1 Aug 1991

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  • Other: DE92009472
  • Report No.: WSRC-MS-91-321
  • Report No.: CONF-910767--5
  • Grant Number: AC09-89SR18035
  • Office of Scientific & Technical Information Report Number: 5539975
  • Archival Resource Key: ark:/67531/metadc1092818

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1991

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  • Feb. 10, 2018, 10:06 p.m.

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  • May 15, 2018, 2:47 p.m.

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Pechersky, M.J. Coherent optical methods for metallography, article, January 1, 1991; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc1092818/: accessed July 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.