Hydrogen behavior in the metal detected by stress measurement and ESD measurement.

金属中的氢引起氢脆，即各种金属变脆断裂的过程。氢探测似乎是这个问题中最困难的方面之一，人们对这种现象还没有完全了解。我们测量了氢等离子体辐照下金属薄膜的表面应力，发现表面压缩应力存在滞后。结构复杂的合金被用作结构材料。目前尚不清楚氢在合金中的位置。利用电子激发解吸（ESD）方法，通过对金属表面二维氢浓度的观察，研究了氢在金属合金中的行为。我们已经检测到微米级的氢分布表面修饰。

Hydrogen in metals causes hydrogen embrittlement, which is the process of various metals to become brittle and fracture. Hydrogen detection seems to be one of the most difficult aspects of the problem and the phenomenon was not completely understood.We have measured a surface stress of metal thin film during hydrogen plasma irradiation and detected compressive surface stress, which had a hysteresis. Alloys of complex structure are used as structural materials. It is not known where the hydrogen is in the alloy. We have tried to investigate hydrogen behavior in metal alloys from observation of two-dimensional hydrogen concentration on metal surface using electron stimulated desorption (ESD) method. We have detected micron order surface modification of hydrogen distribution.