Acta Metall Sin  1997, Vol. 33 Issue (2): 213-221    DOI:

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Al_2Ni_3 PRECIPITATION INDUCED BY ELECTRON BEAM IRRADIATION

D.L.Li.(Department of Materials Physics; University of Science and Technology Beijing; Beijing100083; China)H.Hashimoto(Department of Mechanical Engineering; Okayama University of Science; Japan)

D.L.Li.(Department of Materials Physics; University of Science and Technology Beijing; Beijing100083; China)H.Hashimoto(Department of Mechanical Engineering; Okayama University of Science; Japan). Al_2Ni_3 PRECIPITATION INDUCED BY ELECTRON BEAM IRRADIATION. Acta Metall Sin, 1997, 33(2): 213-221.

Abstract References Related Articles Recommended Metrics Download:  PDF(5117KB)  Export:  BibTeX | EndNote (RIS)       Abstract  An as-quenched Cu-11 .2%(wt)%Al-2.9 (wt)%Ni alloy specimen. which consists ofordered N9R and 2H structure martensites, was examined by a 400 kV TEM. Largenumbers of dispersive precipitates in the specimen are induced by the electron beam irradiation, These fine particles are identlfied as AI2Ni3 phase by electron diffraction.The stereoscopic measurement of the dark field TEM images combined with HREMstudy showed that this irradiation induced precipitation is not only a surface reaction.AIzNi3 particles precipitate preferentially at crystalline defects and interfaces of themartensitic matrix. When duration of the electron beam irradiation lengthens. growthand coarsening of the precipitates are also observed. Key words:  Cu-Al-Ni alloy      electron microscopy      irradiation effects      precipitation of Al_2Ni_3      martensitic structure      Received:  18 February 1997      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1997/V33/I2/213 1 L.W.Hobbs, Introduclion to Analytical Eleclron Microscopy, eds. J.J.Hren, J.I.Goldstein and D.J.Joy(Plenum Press, New York, 1979) p.437. 2 K.H.Westmacott and U.Dahmen, In situ ExperimenIs wiIh Hfor Voltagr Electron Microscopes, ed.H.Fujita, (1985) p. 137. 3 D.Liu, H.Hashimoto and T.Ko, J.Mater.Sci. (1996 in press). 4 V.L.Himes, MJ.Carr, R.Anderson et al, Elemental and Interplanar Spocing Index .for Phase Identifca-tion by Electron or Xray Diffaction. (1989)72. 5 M.Kiritani, Electron Microsc. 16(2)(1981) 71 (in Japanese). 6 K.C.Russell, Radtation Efkcts in Breeder Reactor Structural Materials, eds. 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