Effects of Neutron Irradiation and Thermal Annealing on Model Alloys Using Positron Annihilation Techniques / ES. Cumblidge, GL. Catchen, AT. Motta, G. Brauer, J. B¿̐ưhmert
- Conference Author:
- Effects of Radiation on Materials: 20th International Symposium (20th : 2000 : Williamsburg, Virginia)
- Physical Description:
- 1 online resource (15 pages) : illustrations, figures, tables
- Additional Creators:
- Motta, A. T. (Arthur T.), B¿̐ưhmert, J., Brauer, G., Catchen, GL., Cumblidge, ES., American Society for Testing and Materials, and ASTM International
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- We present the results of a systematic investigation of neutron-irradiated and thermally annealed Fe-Cu-Ni-P model alloys using positron annihilation spectroscopy (PAS), including lifetime and Doppler broadening techniques, and Rockwell hardness. These alloys were examined in the as-fabricated state, after irradiation at 270¿̐ư C to 1 ¿̐ư 1019 n.cm-2, and to 8 ¿̐ư 1019 n.cm-2, and after successive post-irradiation isochronal anneals at temperatures from 200 to 600¿̐ư C. The results can be qualitatively explained by invoking an irradiation-induced microstructure consisting of a combination of small dislocation-type defects or defect clusters (matrix damage) and dense precipitation of fine scale irradiation-induced precipitates. The matrix damage anneals between 350¿̐ư C and 450¿̐ư C. The irradiation-induced precipitates also evolve with annealing, but at higher temperatures. The combined effect of high Cu and high Ni concentrations leads to more extensive irradiation-induced precipitation than in cases where either element is missing, whereas the effect of P is less pronounced. We analyze and compare the results with similar measurements performed on irradiated pressure-vessel steels and with other positron measurements on model alloys, reported in the literature.
- Dates of Publication and/or Sequential Designation:
- Volume 2001, Issue 1405 (January 2001)
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- ISBN:
- 9780803154544 (e-ISBN)
9780803128781
0803128789 - Digital File Characteristics:
- text file PDF
- Bibliography Note:
- Includes bibliographical references 24.
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- Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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- Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 2001. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
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- Mode of access: World Wide Web.
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- ASTM International PDF Purchase price USD25.
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