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在540和650℃,含氢60—80ppm的纯Ti板材的屈服强度σ_(0.2)出现降低,进一步增加氢含量,σ_(0.2)不再降低。在室温和540℃,氢含量低于50ppm时,应力-应变曲线上有明显上下屈服点;在650℃或氢含量高于50ppm,明显的上下屈服点消失。由此算得纯Ti中氢原子与位错之间的最大互作用能为0.47—0.53eV。纯Ti中的氢化物均为片状和针状。在氢含量低于80ppm时,氢化物为体心四方结构TiH_2;高于80ppm,为fcc结构TiH_2。在氢含量低至15ppm的试样中也发现了体心四方结构TiH_2。
At 540 and 650 ℃, the yield strength σ_ (0.2) of the pure Ti sheet containing 60-80ppm of hydrogen decreased, and the content of hydrogen further increased, while σ_ (0.2) no longer decreased. At room temperature and 540 ℃, the hydrogen content of less than 50ppm, the stress-strain curve has a significant yield point down; at 650 ℃ or hydrogen content above 50ppm, the apparent yield point down. From this calculation, the maximum interaction energy between hydrogen atom and dislocation in pure Ti is 0.47-0.53eV. Pure Ti hydride are flake and needle. When the hydrogen content is less than 80ppm, the hydride is the body-centered tetragonal structure TiH_2; above 80ppm, the fcc structure TiH_2. Body-centered tetragonal TiH 2 was also found in samples with hydrogen content as low as 15 ppm.