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@TECHREPORT{Thiele:819208,
      author       = {Thiele, Björn and Schubert, F. and Nickel, Hubertus},
      title        = {{B}eitrag zum {H}ochtemperaturverformungsverhalten des
                      austenitischen {S}tahls 1.4981 nach {N}eutronenbestrahlung},
      volume       = {1904},
      number       = {Juel-1904},
      address      = {Jülich},
      publisher    = {Kernforschungsanlage Jülich GmbH, Zentralbiliothek,
                      Verlag},
      reportid     = {FZJ-2016-04916, Juel-1904},
      series       = {Berichte der Kernforschungsanlage Jülich},
      pages        = {114 p.},
      year         = {1984},
      abstract     = {The austenitic steel 1.4981 thermomechanically treated to
                      provide a range of microstructures has been irradiated at
                      temperatures of 400-500 °C with neutron fluxes of 1,55 x
                      10$^{23}$ to 3 x 10$^{25}$ m$^{-2}$. The degree of high
                      temperature helium embrittiement caused by (n, $\alpha$)
                      nuclear reactions was determined in post-irradiation tensile
                      and stress rupture tests at temperatures in the range
                      400-850 °C. Under the irradition conditions used, the
                      production of helium within the grains was so great that the
                      helium concentration at grain boundaries which leads to
                      ductility loss was controlled by the diffusion of helium. At
                      test temperatures below 700 °C, the difference in the
                      duration of tensile and of stress rupture tests has a
                      significant effect. The test results show that the
                      microstructural variations of the steel 1 .4981 tested under
                      the same conditions exhibited similar relative
                      ductilityloss. However, the absolute value of the rupture
                      elongation after irradiation was proportional to the
                      ductility of the material in the unirradiated condition,
                      which was in turn dependent on the thermomechanical
                      treatment. Specimens which had been embrittled by helium
                      were found to contain numerous intercrystalline microcracks,
                      which were orientated normal to the stress direction and
                      eventually caused rupture. The elongation of the specimens
                      resulted mainly from the widening of the microcracks ; the
                      grains themselves were not elongated to the same extent as
                      found in unirradiated specimens. This explains why for the
                      irradiated specimens litte or no secondary creep was
                      observed.},
      cin          = {PRE-2000 ; Retrocat},
      cid          = {I:(DE-Juel1)PRE2000-20140101},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)29},
      url          = {https://juser.fz-juelich.de/record/819208},
}