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In situ observation of morphological changes of gamma ' precipitates in a pre-deformed single-crystal Ni-base superalloy

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    0367053 - ÚJF 2012 RIV GB eng J - Journal Article
    Strunz, Pavel - Schumacher, G. - Klingenhoffer, H. - Wiedenmann, A. - Šaroun, Jan - Keiderling, U.
    In situ observation of morphological changes of gamma ' precipitates in a pre-deformed single-crystal Ni-base superalloy.
    Journal of Applied Crystallography. Roč. 44, č. 5 (2011), s. 935-944. ISSN 0021-8898. E-ISSN 1600-5767
    R&D Projects: GA ČR(CZ) GAP204/11/1453
    Institutional research plan: CEZ:AV0Z10480505
    Keywords : ANGLE NEUTRON-SCATTERING * SANS * TEMPERATURE
    Subject RIV: BM - Solid Matter Physics ; Magnetism
    Impact factor: 5.152, year: 2011

    Exposure of a superalloy to an external load results in anisotropic coarsening of the gamma' precipitates, so-called rafting. It was reported in the past that gamma' rafting can also occur as a result of purely thermal treatment, without the simultaneous presence of an external load, if the specimen has been pre-deformed at relatively low temperature. The evolution of gamma' morphology in pre-deformed specimens of SCA425 Ni-base superalloy was examined in the present study. Unlike in the previous experiments, the compressive stress was used for pre-straining. In situ small-angle neutron scattering (SANS) was employed, which enabled the determination of the morphology directly at high temperature.
    Permanent Link: http://hdl.handle.net/11104/0006660

     
     
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