[en] Full text of publication follows: Four kinds of tungsten (W) materials, i.e., (1) foil of 50 mm thick, (2) polycrystalline (poly-W) with grain size of ∼3 mm, (3) recrystallized (re-W) with grain size of ∼50 mm, and (4) vacuum plasma spraying (VPS-W) coatings, were irradiated at different temperatures employing a linear plasma generator with a flux of 1 x 10²² D/m²/s and energies lower than 100 eV. For 98 eV/D irradiation at near room temperature, the foil shows blisters growing up with fluence up to tens of mm in diameter till 1 x 10²⁶ /m². Rare blisters appear at the poly-W at <1 x 10²⁴/m², and then grow up to some mm even at 1 x 10²⁶ /m². The re-W shows sparse and very small blisters (∼1 mm) even at 1 x 10²⁵ /m². However, at elevated substrate temperatures till ∼550 K, blisters appear earlier at the three materials and becomes much larger at the re-W; with further increasing the temperature to ∼700 K, blisters become smaller at the foil and the poly-W, but continuously larger at the re-W (up to tens of mm). Blisters were hardly observed at the surfaces at the temperatures higher than 850 K. The cross section observation indicates that blister formation is related to the lamellar structure in the foil. In the poly-Wand the re- W, blister growth is predominantly limited within the grains, and shows mainly dome and terrace shapes, respectively, implying origins at near surface region and within grains. Irradiations at lower energies of 38 eV and 7 eV lead to later formation of smaller blisters. Rough surfaces prepared by scratching the surfaces show hindering effect to blister formation. Trapping and deuterium retention in the samples and the latest results from the VPS-W coatings will be reported also. (authors)